Iraqi counter-terrorism service (CTS) vehicles advance towards the Yabasat neighbourhood on March 23, 2017 during their ongoing offensive to push Islamic State (IS) jihadists out of Mosul. About 600,000 people remain in the areas of west Mosul held by the Islamic State group, including 400,000 who are "trapped" in the Old City under siege-like conditions, the UN said. / AFP PHOTO / AHMAD AL-RUBAYEAHMAD AL-RUBAYE/AFP/Getty Images

Iraqi civilians evacuate the area as the Iraqi counter-terrorism service (CTS) advance towards the Yabasat neighbourhood on March 23, 2017 during their ongoing offensive to push Islamic State (IS) jihadists out of Mosul. About 600,000 people remain in the areas of west Mosul held by the Islamic State group, including 400,000 who are "trapped" in the Old City under siege-like conditions, the UN said. / AFP PHOTO / AHMAD AL-RUBAYEAHMAD AL-RUBAYE/AFP/Getty Images

Iraqi civilians fleeing the city of Mosul sit under the rain on March 23, 2017 as Iraqi forces advance in their massive operation to retake Iraq's second city from jihadists of the Islamic State group. AFP/Getty Images

Iraqi civilians are seeing inside a bus as they flee the city of Mosul while Iraqi forces advance in their massive operation to retake Iraq's second city from jihadists of the Islamic State group on March 23, 2017. About 600,000 people remain in the areas of west Mosul held by the Islamic State group, including 400,000 who are "trapped" in the Old City under siege-like conditions, the UN said. / AFP PHOTO / AHMAD GHARABLIAHMAD GHARABLI/AFP/Getty Images

Iraqi civilians flee the city of Mosul as Iraqi forces advance in their massive operation to retake Iraq's second city from jihadists of the Islamic State group on March 23, 2017. About 600,000 people remain in the areas of west Mosul held by the Islamic State group, including 400,000 who are "trapped" in the Old City under siege-like conditions, the UN said. / AFP PHOTO / AHMAD AL-RUBAYEAHMAD AL-RUBAYE/AFP/Getty Images

Iraqi civilians flee the city of Mosul as Iraqi forces advance in their massive operation to retake Iraq's second city from jihadists of the Islamic State group on March 23, 2017. About 600,000 people remain in the areas of west Mosul held by the Islamic State group, including 400,000 who are "trapped" in the Old City under siege-like conditions, the UN said. / AFP PHOTO / AHMAD AL-RUBAYEAHMAD AL-RUBAYE/AFP/Getty Images

Iraqi civilians flee the city of Mosul as Iraqi forces advance in their massive operation to retake Iraq's second city from jihadists of the Islamic State group on March 23, 2017. About 600,000 people remain in the areas of west Mosul held by the Islamic State group, including 400,000 who are "trapped" in the Old City under siege-like conditions, the UN said. / AFP PHOTO / AHMAD AL-RUBAYEAHMAD AL-RUBAYE/AFP/Getty Images

Iraqi civilians flee the city of Mosul as Iraqi forces advance in their massive operation to retake Iraq's second city from jihadists of the Islamic State group on March 23, 2017. About 600,000 people remain in the areas of west Mosul held by the Islamic State group, including 400,000 who are "trapped" in the Old City under siege-like conditions, the UN said. / AFP PHOTO / AHMAD AL-RUBAYEAHMAD AL-RUBAYE/AFP/Getty Images

Iraqi civilians fleeing the city of Mosul sit under the rain on March 23, 2017 as Iraqi forces advance in their massive operation to retake Iraq's second city from jihadists of the Islamic State group. About 600,000 people remain in the areas of west Mosul held by the Islamic State group, including 400,000 who are "trapped" in the Old City under siege-like conditions, the UN said. / AFP PHOTO / AHMAD GHARABLIAHMAD GHARABLI/AFP/Getty Images

Iraqi civilians flee the city of Mosul as Iraqi forces advance in their massive operation to retake Iraq's second city from jihadists of the Islamic State group on March 23, 2017. About 600,000 people remain in the areas of west Mosul held by the Islamic State group, including 400,000 who are "trapped" in the Old City under siege-like conditions, the UN said. / AFP PHOTO / AHMAD AL-RUBAYEAHMAD AL-RUBAYE/AFP/Getty Images

Iraqi civilians fleeing the city of Mosul gather near a sign by the the Islamic State (IS) group on March 23, 2017 as Iraqi forces advance in their massive operation to retake Iraq's second city from IS jihadists. About 600,000 people remain in the areas of west Mosul held by the Islamic State group, including 400,000 who are "trapped" in the Old City under siege-like conditions, the UN said. / AFP PHOTO / AHMAD GHARABLIAHMAD GHARABLI/AFP/Getty Images

Iraqi civilians fleeing the city of Mosul walk past a sign (L) by the the Islamic State (IS) group on March 23, 2017 as Iraqi forces advance in their massive operation to retake Iraq's second city from IS jihadists. About 600,000 people remain in the areas of west Mosul held by the Islamic State group, including 400,000 who are "trapped" in the Old City under siege-like conditions, the UN said. / AFP PHOTO / AHMAD GHARABLIAHMAD GHARABLI/AFP/Getty Images

Iraqi civilians fleeing the city of Mosul gather in front of a sign by the the Islamic State (IS) group on March 23, 2017 as Iraqi forces advance in their massive operation to retake Iraq's second city from IS jihadists. About 600,000 people remain in the areas of west Mosul held by the Islamic State group, including 400,000 who are "trapped" in the Old City under siege-like conditions, the UN said. / AFP PHOTO / AHMAD GHARABLIAHMAD GHARABLI/AFP/Getty Images

Iraqi civilians fleeing the city of Mosul gather in the back of a truck on March 23, 2017 as Iraqi forces advance in their massive operation to retake Iraq's second city from jihadists of the Islamic State group. About 600,000 people remain in the areas of west Mosul held by the Islamic State group, including 400,000 who are "trapped" in the Old City under siege-like conditions, the UN said. / AFP PHOTO / AHMAD GHARABLIAHMAD GHARABLI/AFP/Getty Images

Iraqi civilians flee the city of Mosul as Iraqi forces advance in their massive operation to retake Iraq's second city from jihadists of the Islamic State group on March 23, 2017. About 600,000 people remain in the areas of west Mosul held by the Islamic State group, including 400,000 who are "trapped" in the Old City under siege-like conditions, the UN said. / AFP PHOTO / AHMAD GHARABLIAHMAD GHARABLI/AFP/Getty Images

Iraqi civilians flee the city of Mosul as Iraqi forces advance in their massive operation to retake Iraq's second city from jihadists of the Islamic State group on March 23, 2017. About 600,000 people remain in the areas of west Mosul held by the Islamic State group, including 400,000 who are "trapped" in the Old City under siege-like conditions, the UN said. / AFP PHOTO / AHMAD GHARABLIAHMAD GHARABLI/AFP/Getty Images

TOPSHOT - Iraqi women cry over their brother's body, who was killed by a mortar shell fired by Islamic State (IS) group jihadists on civilians who were gathered to receive aid, in Al-Risala neighbourhood on March 22, 2017, as an ongoing offensive by Iraqi forces to retake the city from the group continues. Iraqi forces launched a major operation to recapture west Mosul -- the most-populated urban area still held by IS -- on February 19, and have retaken a series of neighbourhoods from the jihadists. / AFP PHOTO / AHMAD AL-RUBAYEAHMAD AL-RUBAYE/AFP/Getty Images

Iraqi families fleeing fighting between Iraqi forces and jihadists of the Islamic State group walk in Mosul on March 23, 2017. Iraqi forces gained ground from the Islamic State group in Mosul and have deployed snipers in the Old City to target the jihadists, officers said. / AFP PHOTO / AHMAD GHARABLIAHMAD GHARABLI/AFP/Getty Images

A Federal Police sniper aims towards Islamic State positions at a front line near the old city on the western side of Mosul, Iraq, Wednesday, March 22, 2017. Graffiti on the walls are Shiite slogans. (AP Photo/Felipe Dana)

TOPSHOT - EDITORS NOTE: Graphic content / Iraqi civilians help a man who was injured by a mortar shell fired by Islamic State (IS) group jihadists on civilians, in Al-Risala neighbourhood on March 22, 2017, as an ongoing offensive by Iraqi forces to retake the city from the group continues. Iraqi forces launched a major operation to recapture west Mosul -- the most-populated urban area still held by IS -- on February 19, and have retaken a series of neighbourhoods from the jihadists. / AFP PHOTO / AHMAD AL-RUBAYEAHMAD AL-RUBAYE/AFP/Getty Images

TOPSHOT - An Iraqi security forces member comforts a boy in Al-Risala neighbourhood on March 22, 2017, following a mortar shell attack by Islamic State (IS) jihadists on civilians. Iraqi forces launched a major operation to recapture west Mosul -- the most-populated urban area still held by IS -- on February 19, and have retaken a series of neighbourhoods from the jihadists. / AFP PHOTO / AHMAD AL-RUBAYEAHMAD AL-RUBAYE/AFP/Getty Images

Smoke billows in the Al-Risala neighbourhood west of Mosul as Iraqi counter-terrorism forces clash with Islamic State (IS) group fighters, on March 22, 2017, in an ongoing offensive by Iraqi forces to retake the city from the jihadists. Iraqi forces launched a major operation to recapture west Mosul -- the most-populated urban area still held by IS -- on February 19, and have retaken a series of neighbourhoods from the jihadists. / AFP PHOTO / AHMAD AL-RUBAYEAHMAD AL-RUBAYE/AFP/Getty Images

Iraqis displaced from the Nablous neighbourhood due to the ongoing fighting against Islamic State (IS) group fighters, flee to the Al-Sumoud neighbourhood on March 22, 2017, as an ongoing offensive by Iraqi forces to retake the city of Mosul from the jihadists continues. Iraqi forces launched a major operation to recapture west Mosul -- the most-populated urban area still held by IS -- on February 19, and have retaken a series of neighbourhoods from the jihadists. / AFP PHOTO / AHMAD AL-RUBAYEAHMAD AL-RUBAYE/AFP/Getty Images

Iraqis displaced from the Nablous neighbourhood due to the ongoing fighting against Islamic State (IS) group fighters, flee to the Al-Sumoud neighbourhood on March 22, 2017, as an ongoing offensive by Iraqi forces to retake the city of Mosul from the jihadists continues. Iraqi forces launched a major operation to recapture west Mosul -- the most-populated urban area still held by IS -- on February 19, and have retaken a series of neighbourhoods from the jihadists. / AFP PHOTO / AHMAD AL-RUBAYEAHMAD AL-RUBAYE/AFP/Getty Images

Iraqis displaced from the Nablous neighbourhood due to the ongoing fighting against Islamic State (IS) group fighters, flee to the Al-Sumoud neighbourhood on March 22, 2017, as an ongoing offensive by Iraqi forces to retake the city of Mosul from the jihadists continues. Iraqi forces launched a major operation to recapture west Mosul -- the most-populated urban area still held by IS -- on February 19, and have retaken a series of neighbourhoods from the jihadists. / AFP PHOTO / AHMAD AL-RUBAYEAHMAD AL-RUBAYE/AFP/Getty Images

Iraqi men queue to receive aid in Al-Risala neighbourhood on March 22, 2017, as an ongoing offensive by Iraqi forces to retake the city from Islamic State (IS) group jihadists ontinues. Iraqi forces launched a major operation to recapture west Mosul -- the most-populated urban area still held by IS -- on February 19, and have retaken a series of neighbourhoods from the jihadists. / AFP PHOTO / AHMAD AL-RUBAYEAHMAD AL-RUBAYE/AFP/Getty Images

TOPSHOT - An Iraqi girl cries over her father's body, who was killed by a mortar shell fired by Islamic State (IS) group jihadists on civilians who were gathered to receive aid, in Al-Risala neighbourhood on March 22, 2017, as an ongoing offensive by Iraqi forces to retake the city from the group continues. Iraqi forces launched a major operation to recapture west Mosul -- the most-populated urban area still held by IS -- on February 19, and have retaken a series of neighbourhoods from the jihadists. / AFP PHOTO / AHMAD AL-RUBAYEAHMAD AL-RUBAYE/AFP/Getty Images

TOPSHOT - An Iraqi girl cries over her father's body, who was killed by a mortar shell fired by Islamic State (IS) group jihadists on civilians who were gathered to receive aid, in Al-Risala neighbourhood on March 22, 2017, as an ongoing offensive by Iraqi forces to retake the city from the group continues. Iraqi forces launched a major operation to recapture west Mosul -- the most-populated urban area still held by IS -- on February 19, and have retaken a series of neighbourhoods from the jihadists. / AFP PHOTO / AHMAD AL-RUBAYEAHMAD AL-RUBAYE/AFP/Getty Images

Wounded Iraqi civilians are seen on the back of a pick up truck as they're being evacuated following a mortar shell attack by Islamic State (IS) group jihadists, in Al-Risala neighbourhood on March 22, 2017, as an ongoing offensive by Iraqi forces to retake the city from the group continues. Iraqi forces launched a major operation to recapture west Mosul -- the most-populated urban area still held by IS -- on February 19, and have retaken a series of neighbourhoods from the jihadists. / AFP PHOTO / AHMAD AL-RUBAYEAHMAD AL-RUBAYE/AFP/Getty Images

Iraqis react as a security forces member evacuates them following a mortar shell fired by Islamic State (IS) group jihadists on civilians, in Al-Risala neighbourhood on March 22, 2017, as an ongoing offensive by Iraqi forces to retake the city from the group continues. Iraqi forces launched a major operation to recapture west Mosul -- the most-populated urban area still held by IS -- on February 19, and have retaken a series of neighbourhoods from the jihadists. / AFP PHOTO / AHMAD AL-RUBAYEAHMAD AL-RUBAYE/AFP/Getty Images

A Federal Police Rapid Response Force sniper aims towards Islamic State positions near the old city in Mosul, Iraq, Monday, March 20, 2017. (AP Photo/Felipe Dana)

Federal Police Rapid Response Forces fire a rocket towards Islamic State positions near the old city, in Mosul, Iraq, Monday, March 20, 2017. (AP Photo/Felipe Dana)

A boy rides his bike past destroyed cars and houses in a neighborhood recently liberated by Iraqi security forces, on the western side of Mosul, Iraq, Sunday, March 19, 2017. The battle for western Mosul, including the narrow alleyways of the old city, looks to be the most devastating yet for Iraqi civilians trapped between advancing troops and increasingly desperate Islamic State militants. An estimated 750 civilians have been killed or wounded since the push to retake the western half of the city began in late January, and more than 100,000 have fled. (AP Photo/Felipe Dana)

Iraqi special forces soldiers move toward the front line during fighting against Islamic State militants in west Mosul, Iraq, Friday, March 17, 2017. (AP Photo/Felipe Dana)

Displaced people walk through heavy fog during fighting between Iraqi security forces and Islamic State militants in west Mosul, Iraq, Friday, March 17, 2017. (AP Photo/Felipe Dana)

A Iraqi special forces soldier walks in a burned house near the front line during fighting against Islamic State militants in west Mosul, Iraq, Friday, March 17, 2017. (AP Photo/Felipe Dana)

Iraqi counter-terrorism service (CTS) vehicles advance towards the Yabasat neighbourhood on March 23, 2017 during their ongoing offensive to push Islamic State (IS) jihadists out of Mosul. AFP/Getty Images

Iraqi civilians flee the city of Mosul as Iraqi forces advance in their massive operation to retake Iraq's second city from jihadists of the Islamic State group on March 23, 2017. AFP/Getty Images

Approximately 230 people are reported to have been killed in what is thought to have been a US-led coalition air strike on an Isis-held neighbourhood of Mosul.

A correspondent for Rudaw, a Kurdish news agency operating in northern Iraq, said that 137 people - most believed to be civilians - died when a bomb hit a single building in al-Jadida, in the western side of the city on Thursday. Another 100 were killed nearby.

“Some of the dead were taking shelter inside the homes,” Hevidar Ahmed said from the scene.

A spokesperson for Central Command, which coordinates US military action in Iraq, told The Independent they were aware of the loss of civilian life as reported by Rudaw and the information had been passed on to the civilian casualty team for “further investigation.”

"[The US-led coalition] takes all reports of civilian casualties very seriously and assesses all incidents as thoroughly as possible. Coalition forces work diligently to be precise in our air strikes and ensure that all strikes comply with the Law of Armed Conflict,” Captain Timothy Irish said.

A daily assessment report from Central Command stated that five strikes near Mosul on Thursday had destroyed five Isis units and a sniper team, as well as 11 fighting positions, vehicles and artillery equipment.

No other fighting force in the country has the capability to launch an aerial attack of the scale reported.

Iraqi coalition ground forces, backed by a US-led coalition bombing campaign, began the gruelling Operation Inherent Resolve to remove Isis from Mosul in October 2016.

The jihadist fighters now hold onto approximately a quarter of the city on the western bank of the River Tigris that cuts through Mosul from north to south.

An estimated 400,000 Iraqis are trapped in the remaining Isis-held parts of the city, the UN’s refugee agency said on Thursday. Those caught up in the fighting face growing food shortages or being hit by crossfire if they try to leave.

Expand Close Iraqi counter-terrorism service (CTS) vehicles advance towards the Yabasat neighbourhood on March 23, 2017 during their ongoing offensive to push Islamic State (IS) jihadists out of Mosul. AFP/Getty Images AFP/Getty Images / Facebook

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Whatsapp Iraqi counter-terrorism service (CTS) vehicles advance towards the Yabasat neighbourhood on March 23, 2017 during their ongoing offensive to push Islamic State (IS) jihadists out of Mosul. AFP/Getty Images

Isis has used civilian homes to shelter fighters and weapons throughout the battle for the city, rigging buildings and streets with explosives to impede Iraqi troops’ progress.

The fighting has come at a heavy price for both Mosul’s residents and Iraqi soldiers: thousands of Iraqi civilians have died in the fighting, and a cumulative total of more than 200,000 displaced from their homes.

At least 6,878 civilians were killed in violence mainly inflicted by Isis around the country last year, the United Nations Assistance Mission to Iraq (UNAMI) has said.

Many Mosul residents report their loved ones have died as a result of friendly fire rather than Isis’s warfare tactics.

AirWars, a UK-based non-profit monitoring the effect of anti-Isis air strikes on civilians, said last week that they believed 370 civilians died in US-led coalition bombing in just the first week of March alone.

Over the border in Syria in the last week, the US has been accused of killing civilians in two separate bombing incidents: 33 died in a strike near Raqqa which was supposed to target Isis positions, and more than 50 after a strike hit a mosque in Aleppo province rather than an al-Qaeda meeting point.

Removing Isis from Mosul, which is Iraq’s second largest city, will effectively spell the end of Isis as a land-holding force in the country, driving the remnants of the group back to their de facto capital of Raqqa.

While losing the city will be a decisive blow, the jihadi organisation is expected to pose a renewed threat in the form of an insurgency war against Iraqi forces.

Expand Close Iraqi civilians fleeing the city of Mosul sit under the rain on March 23, 2017 as Iraqi forces advance in their massive operation to retake Iraq's second city from jihadists of the Islamic State group. AFP/Getty Images AFP/Getty Images / Facebook

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Whatsapp Iraqi civilians fleeing the city of Mosul sit under the rain on March 23, 2017 as Iraqi forces advance in their massive operation to retake Iraq's second city from jihadists of the Islamic State group. AFP/Getty Images Expand Close Destroyed buildings remain after fighting between Iraqi security forces and Islamic State militants, in west Mosul, Iraq, Saturday, March 18, 2017. (AP Photo/Felipe Dana) AP / Facebook

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Whatsapp Destroyed buildings remain after fighting between Iraqi security forces and Islamic State militants, in west Mosul, Iraq, Saturday, March 18, 2017. (AP Photo/Felipe Dana)

Independent News Service