Syria and it most powerful ally, Russia, blamed Israel for striking an airbase in the war-torn country on Monday, following a suspected chemical gas attack that killed scores of civilians and drew condemnation from world powers. Russia's Defense Ministry claimed two Israeli F-15 warplanes launched airstrikes on the T-4 base in central Syria from Lebanese territory . Israeli officials have not issued any response to reports of the strike, but its warplanes did hit the same facility in February.