CAIRO -- A powerful explosion tore through a security headquarters in a city northeast of the Egyptian capital early Tuesday, killing at least 13 people and injuring more than 100 others, state media reports said.
[Updated, 11:30 a.m. PST Dec. 24: The official death toll was later raised to 15.]
The attack occurred a little after 1 a.m., when many people are typically still out in the streets in Egyptian cities. Television showed floodlighted scenes of large crowds gathered outside the security building, part of its facade sheared off, while medical personnel worked frantically to treat injured and searchers began gingerly removing slabs of the wreckage.
The blast set cars ablaze and damaged nearby buildings. Twisted metal and broken glass littered the surrounding area.
At least eight of the 13 confirmed dead were identified by authorities as police officers, and the others either civilians or unknown. Officials cited by state media had initially put the death toll at 14, and hours later, rescuers were still looking for bodies or survivors among the rubble.
In the months since Islamist president
Mansoura has been the scene of frequent protests by supporters of the