One officer was wounded after "unknown assailants" fired the grenades

A garrison belonging to Egyptian state security forces has been hit by four rocket-propelled grenades in the town of Rafah in the Sinai Desert.

Egyptian security sources said that one officer was wounded in the Monday incident after "unknown assailants" fired the grenades at the building.

The incident took place as Egyptian revolution has entered its 14th day with millions of people along with opposition groups continue their protests demanding for the ouster of embattled President Hosni Mubarak.