Israeli warplanes have flown at low altitude over southern Lebanon in defiance of a United Nations resolution, reports from Beirut say.
The fighter jets allegedly caused sonic booms as they flew over the cities of Sidon and Tyre, as well as the towns of Bint Jbeil and Marjayoun.
Israel has so far made no comment on the Lebanese claims.
Israel has been criticised by the UN for making a number of overflights in Lebanon in recent weeks.
Israel says they are necessary to monitor activities by the Lebanon-based Hezbollah militants.
Lebanese police said six Israeli aircraft violated Lebanon's airspace at 0700 GMT, according to the AFP news agency.
Police said the jets swooped low over the port cities of Sidon and Tyre as well as the Bint Jbeil region, a Hezbollah stronghold.
Last August's UN ceasefire followed a resolution by the world body that ended a 34-day war between Israel and Hezbollah.