U.S. backed Syrian forces repelled a major counter-attack by Islamic State militants holding out at the country’s largest dam and in the nearby town of Tabqa, the group and activists said on Sunday.
The dam is a key strategic target in the military campaign to isolate and capture the Syrian city of Raqqa, 40 km (25 miles) to the east and Islamic State’s biggest urban stronghold.
The U.S.-backed group said militants attacked their positions north-east of Tabqa and at an airbase to the south of the town where dozens of their fighters were killed; but the coalition of Kurdish and Arab militias was making slower advances in a village east of the town, reports Reuters.
Jehan Sheikh Ahmad, a spokeswoman for the Syrian Democratic Forces (SDF), spearheaded by the powerful Kurdish YPG militia, said the militants were stepping up their resistance as SDF forces got closer to encircling the town and the dam.
“Our forces are advancing…(Islamic State )are facing large difficulties and so they are starting counter-attacks,” said the official whose forces have U.S. special forces with them.
The SDF began an assault to capture the dam and the nearby town almost two weeks ago after the coalition landed some of its fighters on the southern side of the Euphrates near Tabqa, leading to its capture of an air base.
The SDF has been waging a multi-phased offensive since November to isolate Raqqa, with backing from the U.S.-led coalition taking territory to the north and east of the province.
Hundreds of families with their cattle, property, motor bikes and vans continued on Sunday to flee from villages under Islamic State control.
The U.S.-backed forces say at least 7,000 people have taken shelter in their areas since the campaign to capture Tabqa.
Many are also fleeing air strikes on civilian areas in Raqqa province that have left dozens dead according to activists and the British-based Syrian Observatory for Human Rights.
Last month strikes believed to be conducted by the U.S.-led coalition hit a bakery and a local market in Tabqa town with dozens of civilians killed. Another raid that hit a school sheltering displaced people near Raqqa also killed scores.