An Israeli air strike on a government-held village on the Syrian side of the Golan Heights ceasefire line killed five pro-regime forces on Wednesday, a monitoring group said.

"An Israeli plane hit a car inside the town of Hader, killing two men from (Lebanese Shiite group) Hezbollah, and three men from the pro-regime popular committees in the town," said Rami Abdel Rahman, director of the Syrian Observatory for Human Rights.

Hader is a Druze village that lies along the ceasefire line, with the Israeli-occupied portion of the Golan Heights plateau to the west, and the border with Damascus province to the northeast.