Five Israeli soldiers and at least two Arab guerrillas were killed Tuesday in a clash in southern Lebanon, and Israeli warplanes later attacked bases of the terrorist mastermind Abu Nidal.

The fighting began shortly after midnight near Shebaa, a village on the eastern edge of Israel's self-proclaimed security zone, after Israeli troops arrived by helicopter to battle a guerrilla unit, security sources in Lebanon said. It was the third clash with Palestinians in the security zone in a week.An Israeli military communique from Jerusalem said the soldiers "stormed a ring of four guerrillas who were on their way toward Israeli territory."