Detained members of Islamic State have managed to escape from a Kurdish-run prison in northeastern Syria today after Turkish shelling hit the area following the removal of US forces.

It comes as one hundred thousand terrified civilians fled the Turkish incursion into Syria as President Recep Tayyip Erdogan's troops continue to advance - with Ankara claiming it has killed 342 Kurdish fighters.

'Five terrorists escaped from Navkur after shelling struck near the prison,' said an official from the Syrian Democratic Forces, the de facto army of the autonomous Kurdish region.

Video has emerged allegedly showing a number of prisoners escaping the compound, after Turkish mortar fire against Syrian Democratic Forces trying to move the occupants. 

It comes as Isis claimed responsibility for a car bomb attack in Qwamishli that killed three people - although the group has previously claimed responsibility for attacks it has not been involved in. 

A prison guard at Navkur, which is located in the town of Qamishli, said before the reported breakout that the facility housed mostly foreign jihadists.

Turkey and its Syrian proxies on Wednesday launched a deadly cross-border military offensive against areas controlled by the Syrian Democratic Forces.

The attack has resulted in artillery fire striking near a number of critical facilities, including some of the prisons where thousands of IS suspects are being held.

Without the support of US troops, who pulled back from the border earlier this week, Kurdish fighters have redeployed from other areas in a bid to hold off Turkish-backed forces.

Another Kurdish official said the Jerkin facility, another nearby prison, had also come under regular Turkish fear, increasing the chances of a breakout there too. 

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