Israel's army fired tank shells into Syria on Monday in response to a Syrian mortar shell that struck the Israeli-occupied Golan Heights, the Israeli military spokesman said in a statement. He added: “the army fired at the source of the fire in Syria”. The Syrian shell landed in an open area without causing any damage or injuries and it was not immediately clear if anyone was hit by the Israeli. It was the second time in two days that Israel has responded to what it said was errant Syrian fire. On Sunday the military said it had fired a "warning shot" across the disengagement line, while on Monday it said it had fired back at "the source".