The Latest: Tillerson: Russia, Iran share 'responsibility'

BEIRUT (AP) — The Latest on the suspected chemical attack in Syria (all times local):
4 a.m.
The Russian Defense Ministry says a rebel-held town in northern Syria has been exposed to toxic agents from a rebel arsenal hit by a Syrian air strike.
The ministry spokesman, Maj. Gen. Igor Konashenkov, said in a statement early Wednesday that the Russian military assets registered a Syrian air force strike Tuesday on weapons depots and ammunition factory on the eastern outskirts of the town of K