Two rockets have been fired into northern Israel from Lebanon. There were no immediate reports of casualties or damage.
Remnants of a Katyusha rocket were found in Israel, police said.
Israel and the Lebanese militant and political group Hezbollah fought a devastating 34-day war across the border in July 2006.
This was triggered by a Hezbollah raid into Israel, in which the group seized two soldiers and killed others.
On the Lebanese side more than 1,000 people died, mostly civilians. About 160 Israelis - most of them soldiers - died in the fighting and rocket fire.
The border has been tense, but largely quiet. There have been occasional clashes and rocket fire, for which Hezbollah has denied responsibility.
BBC NEWS | Middle East | Rockets hit Israel from Lebanon