Israel has warned the UN force in Lebanon that al-Qaida is planning an attack on international peacekeepers, Israel TV reported Friday. The report said Israel had received intelligence that al-Qaida's deputy chief, Ayman al-Zawahri, had issued the order to attack the peacekeepers. It did not give details on the source of the information or when the attack might take place. There were no new videos or messages from al-Zawahri posted Friday on militant Web sites where he usually releases statements. But in a video released this year marking the anniversary of the September 11, 2001, attacks in the US, al-Zawahri denounced the beefed-up UN peacekeeping force in Lebanon.