(AFP) -- The Syrian government controls only party of the territory on the other side of the line, with the rest in the hands of rebel groups, one of them affiliated to Isis group.

But the Israeli army said it would retaliate against the Syrian army, regardless of who was responsible for any fire and of whether it was deliberate or unintentional.

Israeli forces identified four hits from five rounds launched at the northern Golan from Syria, the army said, without reporting any casualties or damage.

"In response to the projectiles that hit Israel, [Israeli army] targeted three artillery cannons of the Syrian [government] in the Syrian Golan Heights," it said.

"Any future occurrences will force the [Israeli army] to intensify its response," the army said, adding that it held "the Syrian [government] accountable for any aggression from within its territory."

Israel seized 1,200 square kilometres (460 square miles) of the Golan Heights from Syria in the Six-Day War of 1967 and later annexed it in a move never recognised by the international community.

The two countries remain technically at war, although before the eruption of the conflict inside Syria in 2011 the armistice line remained largely quiet.

(Photo: AFP)