Egypt: blast at security building kills at least 8 "It is still unclear what caused the explosion, but it seems to be a big one that led to the collapse of parts of the security building in Dakahlyia and we are expecting many injuries and potential deaths," a security source said. But later Magdi Hagazi, a senior health official in the province of Daqahleya, of which Mansoura is the capital, said at least "eight people were killed and another 90 wounded" in the blast. The impact of the explosion was felt around 12 miles away and shattered windows of nearby buildings, the security sources said. Egypt's Nile News TV cut into its late-night programming to urge people to go to hospitals to donate blood to the victims of the attack, which it described as the worst in the city's history. Attacks on soldiers and policemen have sharply risen in Egypt since the Egyptian army ousted elected Islamist President Mohammed Morsi in July in the face of mass unrest against his rule. Most of the attacks have occurred in the Sinai, which borders Israel and the Palestinian Gaza Strip. Around 200 soldiers have died in Sinai alone since Mr Morsi was ousted.