Four missiles have been fired from southern Lebanon towards Israel, a source within the Israeli army says.
Shortly before this became known, air-raid sirens went off in the region east of the coastal city of Haifa. Israel quickly announced that it was firing back artillery.
It is the third time that missiles have been fired at Israel from Lebanon since the violence started last week. Rockets would also have been launched towards Israel from Syria.
The last time missiles from southern Lebanon headed toward Israel, and not a single missile made it across the border.
Israel then also retaliated with artillery attacks on the locations where the projectiles came from.