No injuries or damage was reported.
Sirens wailed in northern Israel where the rockets hit and the Israeli army said it "holds the Lebanese Army responsible for attacks emanating from its territory."
Lebanese security officials said the rockets were fired from an area south of the Lebanese port city of Tyre. They spoke on condition of anonymity because they were not authorized to brief reporters.
The rocket fire came amid tensions on the border after Samir Kantar, a fighter from the Lebanese militant group Hezbollah who carried out a notorious attack in Israel, was killed in Syria in an airstrike.
Kantar spent nearly 30 years in an Israeli prison after being convicted of the 1979 killing an Israeli policeman along with a father and his 4-year-old daughter.
He was returned to Lebanon in a controversial prisoner exchange.