The fight against Islamic terror group, ISIS has suffered a serious setback in Syria.

A monitor said Saturday that the Islamic jihadists recaptured nearly all of Albu Kamal, a Syrian border town that had been taken back from IS by Syrian regime.

IS fighters were said to have put up a fierce fightback for what had been the last significant Syrian town under their control

Syrian regime forces and allied militia overran Albu Kamal, which lies on the border with Iraq, on Thursday but have since faced a string of IS counter-attacks.

On Saturday, the Syrian Observatory for Human Rights said IS had “ambushed” the attacking forces and managed to oust them from most of the town.

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“IS has almost completely retaken control of Albu Kamal, pushing pro-regime forces to its southern and eastern edges,” said Rami Abdel Rahman, head of the Britain-based monitor.

Clashes were still raging there on Saturday, he said.

IS began counter-attacking on Thursday night, swiftly retaking several northern districts of Albu Kamal from pro-government fighters.

“It was Daesh’s biggest ambush operation, tricking the attacking forces into thinking they had controlled the city,” Abdel Rahman said, using the Arabic acronym for IS.

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