Tripoli, Lebanon: Rioting broke out at a prison in the northern Lebanese city of Tripoli on Monday with inmates taking warders hostage to demand better conditions and reduced sentences, a security official said.

"Some 30 inmates at Qobbeh prison managed to seize six warders and are demanding that conditions inside the prison be improved and that their sentences be reduced," the official told AFP, speaking on condition of anonymity.

He said riot police had entered the prison and negotiations were underway to end the mutiny.

The main road leading to the overcrowded prison inside the city limits was sealed off and two ambulances were seen entering the facility, according to an AFP reporter at the scene.

Rioting broke out at the same prison in January 2009 with inmates also seizing jailers to demand better conditions.

Qobbeh is the largest prison in northern Lebanon and houses 600 inmates.