An Israeli air strike has killed two Hamas fighters in the northern Gaza Strip and wounded three others, Palestinian medics said. The Israeli military said it launched a strike on a field near Bait Lahiya in the Jabalya refugee camp on Sunday at fighters attempting to fire rockets.The killing of the Hamas fighters was the first by Israel since the Islamic resistance movement formally scrapped a 16-month truce with Israel on Friday and resumed firing rockets and mortar bombs from Gaza. Three other Hamas fighters were wounded in the air strike. Security sources named one of the dead men as Salem al-Arabiya, who was a local commander of the Hamas' armed wing, Ezzedine al-Qassam Brigades. Hamas said it ended the truce in response to the recent killing of seven people on a Gaza beach during Israeli shelling.