Seven Katyusha rockets have been fired from southern Lebanon into northern Israel, Lebanese police said.
No injuries were reported.
Three projectiles landed late on Tuesday in the town of Kiryat Shemona, near the Lebanese border, causing some damage, the Israeli army said, according to the Associated Press.
Israeli Channel Two television showed the remains of what appeared to be a Katyusha rocket, along with pictures of holes in the ground and in the side of a home.
Lebanese police told AFP that two rockets were fired from an area 20km southeast of Tyre near the border and five others from Aadaysse hill.
At least three Israeli assault helicopters were flying low over the frontier region.
No claim
There was no immediate claim of responsibility for the rocket attack.
A Hizb Allah spokesman in Beirut denied any knowledge of the attack, and Sultan Abu Aynaeyn, in charge of the Palestinian Fatah movement in Lebanon, denied any involvement by Palestinians in a statement to a local television station.
Hizb Allah and Palestinian fighters operate in nearby southern Lebanon.
Last month, Israeli fighter jets attacked a Hizb Allah command post in south Lebanon, a day after Hizb Allah rocket and mortar attacks wounded 11 Israeli soldiers and damaged a house in an Israeli border community.
Israel withdrew from an occupied enclave in southern Lebanon in 2000. While fighting in the area has dropped since then, the border remains tense, and Hizb Allah frequently targets Israeli troops in the disputed Shebaa Farms area.
Lebanon and Syria say Shebaa Farms is Lebanese territory, but UN cartographers who surveyed the border after the Israeli withdrawal said it belongs to that part of Syria which Israel has occupied since the 1967 Middle East war.
Israel says it will discuss control of the area only in future peace talks with Syria.
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