A mortar round fired from Syrian territory fell in the the Israeli-occupied sector of the Golan heights on Tuesday, but caused no injuries, the Israeli military said.

"A mortar shell from Syria landed a little while ago in the southern Golan Heights," an army spokeswoman told AFP. "No injuries or damage were reported."

She said the incident was reported to UN ceasefire monitors in the area.

Last week Israeli troops on the strategic plateau fired an Israeli-made Tamuz anti-tank missile at a Syrian army post after coming under fire twice in 12 hours.

It was not clear in any of the cases whether the shooting was from the Syrian army or from rebel forces in the area.

Last November, gunfire from Syria prompted troops to respond with artillery in the first instance of Israeli fire at the Syrian military since the 1973 war.

Israel is closely monitoring its border with Syria and fears that jihadist elements from among the rebels fighting the regime of President Bashar al-Assad might attempt to attack the Jewish state.

Earlier on Tuesday, Defence Minister Moshe Yaalon repeated a warning to respond to every instance of fire from the Syrian-held side.

"Whether it's aimed at our territory or not we respond to silence the source of fire, as happened last week," he told reporters during a visit to the Golan.