Deadly blast at Egypt security site 24 December 2013 Last updated at 00:48 A blast at a security building in northern Egypt has killed at least five people and injured dozens, security sources and state media say. They say the explosion in the Nile Delta town of Dakahliya, north of Cairo, was massive and led to a partial collapse of the building. There are fears that the death toll could rise further. It was not immediately known what caused the explosion, but one report suggested it was a car bomb. The explosion shook the building at about 01:10 on Tuesday (23:10 GMT on Monday), officials say. At least 80 people were injured. The blast shattered windows of nearby buildings and its impact was felt about 20km (12 miles) away, reports say.