Israelis watch as firefighters try to douse a fire from a rocket that hit a petrol station in the southern Israeli city of Ashdod, wounding three.

Israelis watch as firefighters try to douse a fire from a rocket that hit a petrol station in the southern Israeli city of Ashdod, wounding three. Photo: Getty Images

Jerusalem: Two rockets were fired into northern Israel from Lebanon on Friday, and Israel's army responded with artillery fire, Lebanon's news agency and security sources said, adding it was unclear who was behind the initial attack.

Israel called up 33,000 reserve soldiers and may bolster infantry brigades, as a rocket fired from Gaza seriously wounded an Israeli civilian for the first time.

Two others were hurt when the rocket hit a gas station in Ashdod, police said. Earlier, warning sirens sounded in Haifa, one of the major cities of northern Israel.

Southern Lebanon is a stronghold of Hezbollah, a Shiite group that battled Israel eight years ago and is engaged in Syria's civil war in support of President Bashar al-Assad; but there are also Palestinian groups operating in the same area.

Lebanon's news agency NNA said the rockets were fired from the Hasbaya area in Lebanon. There was no immediate claim of responsibility for the attack.

An Israeli military spokeswoman confirmed that Israel responded with artillery fire. Israel shot back around 25 shells, the Lebanese security sources said.

Israeli Chief military spokesman Brigadier-General Motti Almoz said a rocket fell near Kibbutz Kfar Yuval and that the military was checking for more details on the source of the firing. There were no casualties or damage.

Reuters, Bloomberg