Turkish forces have been accused of letting 150 Kurds trapped in basements burn to death, while the country has responded to this week's deadly bombing in Ankara with increased shelling in Syria.

Kurdish MP Feleknas Uca claimed burned bodies were found also found without heads in the district of Cizre, which has been under Turkish siege for several months.

She did not specify when the alleged atrocities took place, though her comments come as the military responds with brutal force to this week's bombings at the hands of Kurdish separatists.

Today the Kurdistan Freedom Hawks - a militant group once linked to the outlawed PKK - claimed responsibility for Wednesday's bomb attack.

A Kurdish MP has claimed the Kurds died when they were burned alive inside buildings in Cizre (pictured)

She accused the Turkish forces of allowing 150 people to be burned inside the basements

The district has been shelled for months as Turkey cracks down on Kurdish separatists

Firefighters work at the explosion scene in Ankara on Wednesday, believed to have been caused by a suicide car bomber operating with Kurdish separatists

The blast, which occurred close to the country's parliament, killed 28 people and wounded dozens more

A bus smoulders at the site of the deadly bombing, the second to occur in Turkey in the past few months

On Wednesday, a car bomb detonated in the capital of Ankara, causing a blast and inferno that killed 28 people.

This was followed yesterday by a remote controlled explosion in the country's far southeast which struck a military convoy, killing another seven.

The Turkish leadership swiftly condemned the attacks and immediately blamed them on Kurdish separatists operating in Syria, who it says are linked to the outlawed PKK.

Ms Uca, a Kurdish MP in Turkey, told Sputnik: 'In Cizre district of Sirnak, around 150 people have been burned alive in different buildings by Turkish military forces.

'Some corpses were found without heads. Some were burned completely, so that autopsy is not possible.'

The region, located near where the borders of Turkey, Syria and Iraq meet, has been subjected to curfews and blockades for several months as Ankara attempts to stamp out the PKK.

She added that the situation in Diyarbakir, district further inland, was 'terrible', with hundreds trapped in basements during their 79th day of curfews.

Turkey's attacks have also spread further into Syria in recent months as it attempts to weaken Kurdish forces fighting in the neighbouring civil war.

Today it intensified its nearly week-long shelling of positions in Aleppo province, where it has sought to halt the advance of a Kurdish-led alliance against rebel forces.

A joint military funeral is held for six men who were killed in the bomb blast in Ankara on Wednesday evening

Prime Minister Ahmet Davutoglu (centre), Minister of National Defence Ismet Yilmaz (second from left), Interior Minister Efkan Ala (fourth from left) and Governor of Ankara Mehmet Kiliclar (right) inspect the bombing site

Davutoglu lays flowers at the site of the bombing which killed 28 people and wounded more than 60

Mesude Celik, the mother of gendarme master-sergeant Halit Zilani Celik, mourns during his military funeral

Turkish soldiers carry the coffins of six soldiers who were killed in the blast, which targeted military buses

Turkish leaders immediately blamed Kurdish separatists emanating from Syria for the car bombing

The military funeral, held in Kocatepe Mosque in Ankara, was attended by hundreds of army soldiers

The coffins of the six military men killed in the blast are carried before their colleagues in Ankara today

Turkish Prime Minister Ahmet Davutoglu and Chief of Staff General Hulusi Akar (pictured together centre) pray during the ceremony

The Syrian Observatory for Human Rights monitor said Ankara's overnight bombardment was the heaviest since it began targeting the Syrian Democratic Forces (SDF) on Saturday.

Turkey also expanded its fire, the Britain-based monitoring group said, hitting the Kurdish town of Afrin for the first time, where two civilians were killed and 28 wounded.

Ankara has been angered by the SDF's operation in Aleppo province, where it has seized key territory from rebel forces supported by Turkey.

Ankara considers the Kurdish People's Protection Units (YPG) that dominate the SDF to be an affiliate of the outlawed PKK, which has waged a decades-long insurgency against the Turkish state.

It accuses the YPG and PKK of being behind a bombing that killed 28 people in the Turkish capital on Wednesday night, a claim denied by the Syrian Kurdish group.

Meanwhile, authorities have detained three more suspects in connection with the deadly bombing in Ankara.

Anadolu Agency reported 17 people are now in custody as part of the investigation into Wednesday's attack, which targeted buses carrying military personnel.

It said the latest suspects are believed to be linked to the outlawed Kurdistan Workers' Party, or PKK.

Prime Minister Ahmet Davutoglu has said the attack was carried out by a Syrian national who was a member of the YPG, and had entered Turkey posing as a refugee.

People look out from a building badly damaged last month during the Turkish shelling of Diyarbakir, Turkey

Soldiers and security officers stand next to a military vehicle that was bombed in the south-east yeserday

Turkish soldiers raced to the scene of the remote controlled bombing, which targeted a military convoy

The bus was destroyed in the blast which occurred less than 24 hours after the attack in Ankara

Today the Kurdistan Freedom Hawks (TAK) militants - a group once linked to the outlawed PKK - claimed responsibility for the attack on the Turkish capital.

According to a statement on its website, it said the bombing was in response to the policies of President Tayyip Erdogan and said it would continue its attacks.

The statement read: 'On February 17 in the evening a suicide attack was carried out by a sacrifice warrior on a military convoy of the fascist Turkish Republic in Ankara.

'The attack was realised by the Immortal Battalion of the TAK.'

It said the bomber was a 26-year old Turkish national born in the eastern city of Van.

The group most recently claimed responsibility for a mortar attack at Istanbul's second airport in December that left an aircraft cleaner dead.