In a statement about the resignation, Mohammed Ali, a spokesman for al-Khatib, said, “For two years now we’ve been slaughtered. We keep hearing that we will get arms, then that we won’t get arms. Everyone is trading in the Syrian crisis for their own interest and agenda. The international community is doing nothing.”

Al-Khatib was head of the opposition Syrian National Coalition.

The Israeli military, meanwhile, said its troops came under fire Sunday in the Golan Heights from the Syrian side — and soldiers returned fire.

Israeli Defense Minister Moshe Yaalon blamed the Syrian military for the incident.