Loud booms resounded over Beirut (search) and a Palestinian guerrilla base south of the capital Tuesday as Israeli warplanes streaked across Lebanese airspace.

Earlier, a guerrilla official said the jets fired at least four missiles at the hilltop base of the Popular Front for the Liberation of Palestine-General Command, but he later said there was no airstrike. He apparently confused the low overflights and sonic booms with missile fire.

Israeli military officials confirmed its air force planes flew over Lebanon but denied firing at any targets.