United Nations, May 6 (IANS): UN Secretary-General Ban Ki-moon has voiced "grave concern" at reported Israeli air strikes on Syria, and called on all sides to "exercise maximum calm and restraint".

"The secretary-general expresses grave concern over reports of air strikes in Syria by the Israeli Air Force," Xinhua quoted a statement issued by Ban's spokesman as saying.

"At this time, the United Nations does not have details of the reported incidents," the statement said.

"Nor is the United Nations in a position to independently verify what has occurred," it added.

Media reports said Syria has deployed missile defence batteries towards Israel in response to the Israeli attack that targeted a Syrian army facility in the capital city of Damascus Sunday.

Syria's state media accused Israel of trying to give a boost to the Syrian rebels. The Israeli government has so far made no official comment on the reported attack.

The UN statement added: "The secretary-general calls on all sides to exercise maximum calm and restraint, and to act with a sense of responsibility to prevent an escalation of what is already a devastating and highly dangerous conflict."

"The secretary-general urges respect for national sovereignty and territorial integrity of all countries in the region, and adherence to all relevant Security Council resolutions," it said.