The UN Security Council expressed “grave concern” for the safety of its monitors in the Golan Heights in light of the escalating violence in Syria.

In a statement issued Wednesday, the UN cited attacks on its observers in the Golan Heights by Syrian forces in February and March as its cause for concern.

Despite worries over observers’ safety, the Security Council unanimously resolved to extend the mandate of the UN Disengagement Observer Force between Israel and Syria until December 31, 2012.

It called on both Israel and Syria “to exercise maximum restraint” and to ensure the safety and “unhindered and immediate access” of the UN observer force in the Golan.