Lebanese security officials say an explosion inside a coffee shop in the northern Lebanese city of Tripoli has killed at least two people and wounded others.

The officials say that the cause of the explosion was not immediately clear Saturday night. They spoke on condition of anonymity as they weren't authorized to talk to journalists.

Several local television stations called it as a suicide attack.

The explosion struck the predominantly Alawite neighborhood of Jabal Mohsen.

Tripoli has been relatively quiet recently after years of tension between its majority Sunni population and its Alawite minority. Embattled President Bashar Assad in neighboring Syria is an Alawite and support for him in Tripoli has sparked violence before.