Israel has remained silent until now in the face of the fighting from Syria spilling into the Golan Heights, but cannot be expected to do so for an extended period of time, its ambassador to the United Nations said on Monday.

In an urgent letter he sent to the UN Security Council and the UN Secretary General following the firing of artillery shells on the Golan Heights, ambassador Ron Prosor warned that the situation in the Golan could escalate unless something is done.