At least five people have been wounded by an explosion in a Druze town in the mountains east of the Lebanese capital, Beirut, security sources say.
Police said a bomb had gone off near the main government building in Aley.
The bombing was the third since fighting broke out between Lebanese troops and Islamist militants at a Palestinian refugee camp four days ago.
A woman was killed in a Christian area of Beirut on Sunday, while six people were injured in the capital on Monday.
Wednesday's bomb also damaged a number of shops and businesses in the popular summer resort town, which lies on the main Beirut-Damascus road.
Druze leader Walid Jumblatt, to whom many of the town are loyal, recently warned of the possibility of further bomb attacks across Lebanon.