Smoke was seen rising from the site of the blast. The residents of the area are mostly Christians.
The cause was not immediately clear.
The explosion occurred at a time of heightened tension between Lebanese political factions on opposite sides of the Syria conflict, Reuters reported.
The war in neighbouring Syria has pitted mostly Sunni insurgents against President Bashar al-Assad, an Awalite linked to Shi'ite Islam.
Via The News Tribe