Egyptian unrest (file)
Egyptian unrest (file) Reuters

The Egyptian capital of Cairo has been shaken by a massive explosion. The blast, originating from a car bomb detonated right next to the city's police headquarters, was powerful enough to destroy much of the structure of the building.

Egypt's health ministry reports at least 4 killed and 51 injured. The blast also damaged the nearby Islamic Museum and National Library.

The bombing, which took place at 6:30 a.m., left the center of Cairo enveloped in smoke, reports Al Arabiya. Gunshots were also reported to have been heard in nearby buildings following the explosion.

A second explosion was later reported in Cairo's Dokki district, targeting a subway station.

The bombings come a day before the anniversary of the 2011 uprising that ousted President Hosni Mubarak. On Thursday, 5 policemen were shot dead by masked gunmen on motorcycles.

The attacks also come on the heels of a constitutional referendum that passed overwhelmingly last Thursday, which promised a "democratic transition" by the interim military government, and which was boycotted by ousted President Mohammed Morsi's Muslim Brotherhood.

The vote stirred up the conflict anew between the military and the Brotherhood, as terrorists in Sinai blew up a gas pipeline immediately afterwards.

Army Chief Gen. Abdel Fattah al-Sisi took the referendum as a vote of confidence for his presidential bid, that was recently backed by Egypt’s interim Prime Minister Hazem el-Beblawi.

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