Hezbollah guerrillas fired anti-aircraft weapons at Israeli warplanes flying over southern Lebanon Sunday, Hezbollah and Lebanese security officials said. 

In a statement issued in Beirut, the Shiite Muslim guerrilla group said its air defense units confronted "Israeli enemy planes that violated Lebanese airspace" over south Lebanon on two occasions Sunday. 

An Israeli army spokesman in Jerusalem said the jets were inside Israeli airspace when Hezbollah fired on the planes and would not say whether the planes crossed the border later. 

Lebanese security officials said the planes entered Lebanese air space and broke the sound barrier over the capital Beirut. The officials, speaking on condition of anonymity, confirmed the anti-aircraft fire, saying no damage was caused. 

Israeli reconnaissance flights over Lebanon have been common since Israeli troops withdrew from southern Lebanon in May 2000, ending an 18-year occupation. 

Lebanon has complained to the United Nations, which has accused Israel of violating Lebanese airspace.