Three Israelis killed in ongoing battles Wednesday night and Thursday in northern Gaza Strip during Israeli military operation against Qassam missile offensive. Two killed, one injured in ambush on Nisanit-Elei Sinai road, where fierce firefight continues. Earlier, one Israeli soldier killed, another seriously injured, in north Gaza Strip town of Beit Hanoun where Israel forces fighting Qassam missile squads. Palestinian assailants killed. Family of fallen soldier informed.