Massive explosion kills 14 at Egypt police station

A powerful car bomb tore through an Egyptian police headquarters Tuesday, killing at least 14 people, in an attack the military-installed authorities said is aimed at derailing a democratic transition.

Hours after the bombing in Mansoura, a city north of Cairo, prime minister Hazem Beblawi labelled the Muslim Brotherhood, the banned movement of ousted president Mohammed Mursi, a "terrorist" group, though the premier did not blame the organization for the blast.

The movement itself strongly condemned the attack, one of the deadliest in Egypt since the military deposed Mursi in July.

The bombing comes just weeks ahead of a referendum on a new constitution billed as the first major step towards democracy after the Islamist leader's overthrow.

The bomb ripped through the multi-story police headquarters in Mansoura shortly after 1:00 am, killing at least 14 people and wounding more than 100, officials said.

"The majority of the casualties are from the police," said Omar al-Shawatsi, the governor of Daqahleya, of which Mansoura is the capital.

Daqahleya security chief Sami El-Mihi was wounded in the blast and two of his aides were killed, security officials said.

The massive explosion – whose impact was felt about 20 kilometers (21 miles) away – stripped off the facade of the building and caused part of its solid structure to cave in.

The wreckage of an armored police car was nearby, while at least 10 civilian cars were damaged and a nearby building completely collapsed, said an AFP correspondent at the scene.

Angry residents of the area vented their fury on Mursi's Brotherhood movement.

"The Muslim Brotherhood is an international terrorist organization. They are responsible for what happened in Mansoura," said Hamada Arafat, a school teacher.

"They are now adopting tactics like Al-Qaeda."

Prosecutors and officials say the Brotherhood has links with Islamist militants who have stepped up attacks on security forces across Egypt, but mainly in the restive Sinai Peninsula.

"This is a more sophisticated attack than previous ones. It could be a sign of things to come... the insurgency in Sinai is becoming emboldened and extending attacks outside the Sinai," said Shadi Hamid, research director at the Brookings Doha Center.

Beblawi said the bombing was an attempt to thwart the country's steps towards democracy, and declared the Brotherhood a terrorist group.

"Prime minister Beblawi has declared the Muslim Brotherhood as a terrorist organization," state news agency MENA quoted his spokesman as saying.

The declaration could have significant political impact ahead of the referendum, but will not have much legal impact as the group has already been banned by an Egyptian court.

In a separate statement carried by MENA, Beblawi later said: "Terrorism will not succeed in derailing the implementation of the road map," but did not mention the Brotherhood by name.

The Brotherhood condemned the bombing "in the strongest possible terms," and also lashed out at Beblawi.

"It is no surprise that Beblawi, the military junta's puppet prime minister, has decided to exploit the blood of innocent Egyptians through inflammatory statements designed to create further violence, chaos and instability," it said in a statement.