A car bomb ripped through a police headquarters in the Egyptian city of Mansoura early Tuesday, killing at least 14 people and wounding more than 130

A car bomb ripped through a police headquarters in the Egyptian city of Mansoura early Tuesday, killing at least 14 people and wounding more than 130.

The security sources said the explosion was massive and a part of the building had caved in. "The majority of the casualties are from the police," Omar al-Shawatsi, the governor of Daqahleya, of which Mansoura is the capital, told state media.
  
The impact of the explosion was felt around 20 kilometres (12 miles) away and shattered windows of nearby buildings, the security sources said. The head of security for Daqahleya, Sami El-Mihi, was wounded in the blast and two of his aides were killed, security sources said.
  
Hours after the bombing, Prime Minister Hazem Beblawi labelled the Muslim Brotherhood a "terrorist" group, though the premier did not blame the organization for the blast.
  
The attack, one of the deadliest since the military removed former President Mohammad Mursi from power in July, comes just weeks ahead of a referendum on Egypt's new constitution that is billed as the first major step towards democracy after the Islamist leader's overthrow.