
In this file photo members of the special forces of the Kurdish-led Syrian Democratic Forces (SDF) are pictured during preparations to join the front against Turkish forces, on October 10, 2019, near the northern Syrian town of Hasakeh. AFP
"Six fighters from the Syrian Democratic Forces (SDF) were killed" in an IS attack along the road linking Deir Ezzor province with Hasakeh, said Rami Abdel Rahman, director of the Syrian Observatory for Human rights.
A seventh was shot dead by IS-linked gunmen in the west of Deir Ezzor province, the Observatory said.
The attacks were carried out in areas under the control of the SDF, which is a key US partner in fighting IS and is the Syrian Kurds' de facto army.
IS seized swathes of Syria and neighbouring Iraq in 2014, declaring a "caliphate" to administer the millions-strong population.
A long and bloody fightback by Syrian and Iraqi forces with backing from the US and other powers led to its eventual defeat in March 2019, but sleeper cells of the Sunni Muslim extremist group still carry out attacks in both countries.
On Thursday, the SDF said two of their fighters were killed and six IS jihadists arrested following clashes in a volatile Syria camp where a security operation was underway.
Syria's war began in 2011 and has killed nearly half a million people and forced around half of the country's pre-war population from their homes.
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