Four rockets have been fired toward Israel from Lebanon, but none landed on Israeli territory, the military says.
The rockets were fired from a location south of the Lebanese port city of Tyre, with one intercepted by Israel's "Iron Dome" defence system. The others did not land in Israel.
Light damage to a street and vehicle in northern Israel was probably caused from fallout from the rocket-defence system. Lt Col Peter Lerner blamed "global jihad" elements of being behind the attack, referring to groups either linked to or inspired by al Qaida.
The military said the firing appeared to be an isolated incident that wouldn't become a larger confrontation.
The Israel-Lebanon border has remained very quiet since Israel and Hezbollah guerrillas battled in a month-long war in 2006. Sporadic incidents of rocket fire have taken place since.
Lebanon's state-run news agency reported three rockets were fired from the village of Housh. There was no immediate claim of responsibility.
"We are acting on all fronts, in the north and in the south, to defend the citizens of Israel from such attacks," Prime Minister Benjamin Netanyahu said in a statement.
"We employ various measures, both defensive and preventive, and we are acting responsibly. Our policy is clear: to protect and to prevent. Whoever tries to harm us should know we will harm them."