ISIS militants killed 10 Syrian troops and pro-government fighters in the former extremist stronghold of Raqqa province, a war monitor said Tuesday.
“ISIS attacked positions and checkpoints belonging to the regime… setting fire to military vehicles and prefabricated houses,” the Syrian Observatory for Human Rights said.
Six soldiers were also wounded in the Monday evening attack, with some in critical condition, said the British-based monitor, which relies on a wide network of sources inside Syria.
Government troops control rural areas in the south and east of Raqqa province, while Kurdish fighters control the rest.
Last week, ISIS announced the death of its leader Abu al-Hussein al-Husseini al-Qurashi, who it said was killed in clashes in northwestern Syria.
In March 2019, ISIS lost the last territory it held in Syria to a Kurdish-led counteroffensive backed by a US-led coalition, but extremist remnants continue to carry out deadly attacks from hideouts in the vast Syrian desert.
Targets have included civilians as well as government troops and pro-Iranian and Kurdish-led fighters.