Kurdish authorities have called for a humanitarian corridor along the frontline of the battle with Turkish forces in northern Syria, saying hundreds of civilians and teams of medics were trapped within the ferocious fighting.

The call for help came amid claims by Isis that its fighters had managed to free female detainees from prisons and centres in the middle of the fighting.

Kurdish authorities have warned they are unable to adequately hold some 10,000 captured fighters, of which around 1,000 hail from European countries, as their forces have been redirected to the front.

The Kurdish-led Syrian Democratic Forces, which is fighting Turkey, admitted to losing control of at least one camp holding hundreds of Isis family members.

Kurdish health officials told The Independent, meanwhile, they need a humanitarian corridor from the border town of Ra al-Ayn, which is the epicentre of Turkey’s incursion, to Tal Tamer, 40km south.

Turkey launches offensive into Syria Show all 25 1 /25 Turkey launches offensive into Syria Turkey launches offensive into Syria Turkish soldiers with armored vehicles EPA Turkey launches offensive into Syria A woman flees with her children during Turkish bombardment on Syria's northeastern town of Ras al-Ain AFP/Getty Turkey launches offensive into Syria Smoke billows following Turkish bombardment on Syria's northeastern town of Ras al-Ain in the Hasakeh province along the Turkish border on October 9, 2019. - Turkey launched an assault on Kurdish forces in northern Syria with air strikes and explosions reported along the border. President Recep Tayyip Erdogan announced the start of the attack on Twitter, labelling it "Operation Peace Spring". (Photo by Delil SOULEIMAN / AFP) (Photo by DELIL SOULEIMAN/AFP via Getty Images) DELIL SOULEIMAN AFP/Getty Turkey launches offensive into Syria The first group of Turkish infantry prepare to enter Syria on the border Getty Turkey launches offensive into Syria Civilians flee AFP/Getty Turkey launches offensive into Syria Smoke billows from targets inside Syria AP Turkey launches offensive into Syria Turkish armoured vehicles enter Syria in Akcakale Getty Turkey launches offensive into Syria Civilians leave as smoke rises from Ras al-Ain AFP Turkey launches offensive into Syria A multi-rocket launcher fires in an unknown location Turkish Defence Ministry via Reuters Turkey launches offensive into Syria People wave as Turkish soldiers prepare to cross the border Getty Turkey launches offensive into Syria Girls stand together in Ras al Ain town Reuters Turkey launches offensive into Syria A woman walks as smoke billows following Turkish bombardment in Syria's northeastern town of Ras al-Ain AFP/Getty Turkey launches offensive into Syria A Turkish army's tank drives down from a truck towards the border with Syria AFP/Getty Turkey launches offensive into Syria Turkish jet taxis on tarmac after returning to a military base in southeast Diyarbakir Reuters Turkey launches offensive into Syria A Turkish armored vehicle drives down a road during a military operation in Kurdish areas of northern Syria EPA Turkey launches offensive into Syria People sit on belongings at a back of a truck as they flee Ras al Ain town Reuters Turkey launches offensive into Syria Turkey-backed Syrian opposition fighters enter Tel Abyad AFP/Getty Turkey launches offensive into Syria Civilians flee AFP/Getty Turkey launches offensive into Syria People flee Tal Abyad North Press Agency/Reuters TV Turkey launches offensive into Syria People wave as Turkish soldiers prepare to cross the border into Syria Getty Turkey launches offensive into Syria Civilians flee with their belongings AFP/Getty Turkey launches offensive into Syria Civilians flee during Turkish bombardment on Syria's northeastern town of Ras al-Ain in the Hasakeh province along the Turkish border on October 9, 2019. - Turkey launched a broad assault on Kurdish-controlled areas in northeastern Syria today, with intensive bombardment paving the way for an invasion made possible by the withdrawal of US troops. (Photo by Delil SOULEIMAN / AFP) (Photo by DELIL SOULEIMAN/AFP via Getty Images) DELIL SOULEIMAN AFP/Getty Turkey launches offensive into Syria Turkish President Recep Tayyip Erdogan, right, speaks with Defense Minister Hulusi Akar, left, as they watch the operation by Turkish forces in Kurdish areas EPA Turkey launches offensive into Syria Smoke rises from the Syrian town of Tal Abyad AFP/Getty Turkey launches offensive into Syria Turkey-backed members of Syrian National Army prepare for moving to Turkey with heavy armed vehicles EPA

Hundreds of civilians and at least three medical teams are currently encircled by fighting and unable to get out, Dr Sherman Berry, a spokesman for Kurdish Red Crescent said.

Similar pleas were released by local health ministry officials who said they needed assistance evacuating “dead and wounded civilians” from Ras al-Ayn.

In the statement, the ministry urged foreign powers including the US-led coalition, and Russia, to intervene to get them out.

“We need a humanitarian corridor urgently because hundreds of civilians and several medical teams are stuck in areas completely surrounded by the fighting,” Dr Berry told The Independent.

“Two medics from the Kurdish Red Crescent were injured while a health ministry ambulance was hit near to Ras al-Ayn killing one – we don’t have access to them,” he added.

Turkey denied claims that it was targeting civilians.

In a statement released by the Turkish presidential office on Wednesday, Turkish officials said that “the Turkish Armed Forces and the Syrian National Army are conducting an extremely meticulous operation without inflicting even slightest harm to civilians, and showing maximum efforts that historical, cultural and religious assets and infrastructure come to no harm.”

The Syrian Observatory for Human Rights (SOHR), a UK-based monitoring group, said on Wednesday at least 300,000 people have been displaced and 71 civilians had been killed in Syria since Turkey launched its cross-border incursion last Wednesday.

However, the health authority of the Kurdish-led administration in the region put the civilian death toll at 218, including 21 children, on Thursday.

The fighting erupted last week when Turkish President Recep Tayyip Erdogan announced a cross border offensive into northern Syria against Kurdish forces which Ankara labels terrorists for its ties to Turkish outlawed group the PKK.

Mr Erdogan said that he aimed to build a 30km-deep buffer zone and would relocate millions of Syrian refugees in Turkey there.

US President Donald Trump was accused of “green lighting” the incursion, after he released a statement saying US troops, who had been fighting alongside the Kurds against Isis, would pull back and not hinder an imminent Turkish attack.

He later ordered the complete withdrawal of all 1,000 US troops from Syria and slapped sanctions on Turkey.

Outgunned, the Kurds struck a controversial deal with Syrian President Bashar al-Assad, who agreed to send troops into northern Syria to defend the border, marking the first-time government forces have had access to the area in at least five years.

But the arrival of the regime, backed by Russian forces, sparked the sudden exodus of approximately 300 foreign aid workers, partially or fully suspending some activities.

They fear arrest or worse, as many organisations are not recognised by the Syrian government.

The Kurdish Red Crescent told The Independent on Wednesday they were unable to cope with the hundreds of injured and hundreds of thousands of displaced on their own.

With the death toll and number of displaced soaring, even the Kremlin spoke out.

Kremlin spokesman Dmitry Peskov called on Turkey to keep its offensive in northern Syria "proportional”.

"We respect Turkey's right to undertake measures for its own security, but we trust that the operation will be proportional to this very purpose – ensuring security and tasks around ensuring security," Peskov said.

The fighting has also sparked fears of the resurgence of Isis, who have exploited the chaos to attack jails and camps where their supporters and family members are held.

On Thursday Isis claimed via its news agency Amaq it had managed to free a “number of detainees” and shot dead six guards during a raid on a camp in Mahmudly village in west Raqqa, but civilians on the ground and the Kurdish authorities have denied the reports. The Independent was unable to independently verify the claim.

Mervan Qamishli, a senior Kurdish official said “there was no accurate information on the names or total numbers of fugitives” because of the fighting.

However least 800 affiliates of Isis broke free form Ain Issa displaced camp, around 100km north of Mahmudly, over the weekend, which Kurdish officials said was attacked by members of the group.

It is unclear what happened the rest of the 13,000 residents of the camp which is now empty or whether other fighters have managed to break free.

French officials have confirmed that nine French fighters managed to escape while Belgium’s security assessment agency said two of their nationals had also escaped custody.

The Daily Telegraph reported that two British Isis affiliates from east London, Tooba Gondal and Zara Iqbal, were among those who escaped but that they were intercepted by Turkish-backed Syrian troops as they tried to flee.

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A medical coordinator for the Kurdish Red Crescent in Ain Issa said that in total at least 50 fighters were freed in the attacks.

“Almost all the guards were killed or wounded. The number of guards has been reduced in the past few days to help fight the Turkish army,” Monir told The Independent.

“People here are worried and most of them have left to Raqqa itself or other cities. There has been an unprecedented wave of displacement. I live in a ghost town now,” he added.

Iraq promised on Thursday to repatriate its nationals who are Isis fighters as well as their families in a bid to help the Kurdish authorities.