Beirut: Kurdish fighters seized a key town in northern Syria from Daesh on Monday, cutting a supply lifeline from the terrorists’ de facto Syrian capital, a monitor said.

“The Kurdish People’s Protection Units (YPG) took full control of Sarrin on Monday after three weeks of intense clashes,” said Rami Abdul Rahman, head of the Syrian Observatory for Human Rights.

Sarrin lies along the M4 highway, which Daesh uses to transport fighters and supplies between Aleppo province and the group’s de facto Syrian capital of Raqqa in the east, Abdul Rahman said.

The town’s capture cuts off Daesh’s main access route to parts of Aleppo province, where the terrorists are fighting both Kurdish forces and rebel groups.

“Sarrin was also used as a base for Daesh to attack the Kurds in Aleppo province, so those attacks will probably decrease as well,” he told AFP.

Mustafa Ebdi, a Kurdish activist from the flashpoint town of Kobani some 40 kilometres north of Sarrin, said the YPG were still combing through the town to clear it of potential Daesh suicide bombers.

YPG forces began their offensive on Sarrin on July 6 with air support from the US-led coalition fighting Daesh in Syria and Iraq.

The capture of the town, which lies on the east bank of the Euphrates river, is the latest victory for Kurdish forces in Syria against Daesh.

They defeated Daesh forces in Kobani in January, expelling them with the help of coalition air strikes.

And on June 16, they pushed Daesh out of Tal Abyad, a town on the Syrian-Turkish border used by Daesh to bring in weapons and fighters to Raqa.

The Syrian conflict began with anti-government protests in March 2011, but has developed into a multi-front civil war involving Kurds and terrorists of both Daesh and Al Qaida, as well as other rebels and regime loyalists.