A war monitor said a senior commander from the security forces in northeast Syria's semi-autonomous Kurdish-led administration was killed on Tuesday in a blast near a prison in Hasakeh province.

"A commander in the Kurdish security forces was killed and another person was wounded" in an explosion near the prison in Umm Farsan on the outskirts of the city of Qamishli "at the same time as a Turkish drone was flying in the area", the Syrian Observatory for Human Rights said.