Explosions have been heard in northern Israel, after rockets were fired across the border from southern Lebanon.
Sirens sounded across the area, but no casualties were reported. Footage showed some minor damage at a kibbutz near the coastal town of Nahariya.
Four rockets were fired from southern Lebanon, a stronghold of the Shia Islamist movement Hezbollah.
An Israeli military spokesman said one of the rockets was intercepted by the Iron Dome missile defence system.
Rockets have been fired into Israel intermittently by militant groups since the Israel-Hezbollah conflict in 2006.
But an Israeli army spokesman told the BBC he did not believe Hezbollah was behind the attack.
Lebanese news agencies reported all four rockets were fired at Israel from the Tyre region in southern Lebanon.
Explosions were heard on Thursday afternoon in Nahariyah, on Israel's west coast, and as far east as Kiryat Shemona.
Footage showed the remains of a rocket in a street, with damage to a car and nearby windows.
Lt. Col. Peter Lerner blamed "global jihad"' elements for the attack, but added Israel had not retaliated.
Israeli Prime Minister Benjamin Netanyahu responded swiftly to the attack, saying Israel was "acting on all fronts" to defend its citizens.
"Our policy is clear: to protect and to prevent. Whoever tries to harm us should know we will harm them," he said.