NATO head Jens Stoltenberg urged Russia and Syria on Friday to halt their Idlib offensive and said the military alliance stood in solidarity with member state Turkey, which lost 33 soldiers in an air strike by Syrian government forces, reports Reuters.

“I call on them to stop their offensive, to respect international law and to back U.N. efforts for a peaceful solution,” Stoltenberg added, calling for a return to a 2018 ceasefire to provide humanitarian aid to Idlib.