The killing of a Syrian rebel chief in an air raid last week does not serve the peace process in the war-ravaged country, Saudi Foreign Minister Adel al-Jubeir said Tuesday, according to AFP.

Zahran Alloush, the head of the Saudi-backed Jaish al-Islam, the foremost
 ebel group in Damascus province, was killed on Friday in a strike claimed by Syria's government.

"Attempts to assassinate leaderships fighting Daesh do not serve the peace process and (efforts) to achieve a political solution in Syria," Jubeir said, using the Arabic acronym for the "Islamic State" (ISIS) terrorist group. "I don't know what the Russians have in mind," he told reporters, in reference to the killing.