Blast hits Egypt Delta police HQ

A powerful explosion has ripped through a police headquarters in an Egyptian Nile Delta city killing 13 people, wounding more than 100 and leaving victims buried under rubble in the deadliest bombing yet in a months-long wave of violence blamed on Islamic militants.
Investigators were trying to discover if the blast, soon after midnight in Mansoura, was from a car bomb or from explosives planted around the building. The explosion left a central street of the city strewn with piles of debris and charred cars.