By Hayley O'keeffe PUBLISHED: 11:47 EST, 24 December 2013 | UPDATED: 15:46 EST, 24 December 2013 A powerful blast tore through a police headquarters in Cairo in the deadliest bombing yet in a months-long wave of violence. So far 13 people are confirmed dead with more than 100 people wounded and many still buried under the rubble. Officials have pinned the blame  on the Muslim Brotherhood, which has been leading a campaign of protests since the July ousting of Islamist President Mohammed Morsi. Scroll down for video Egyptian security forces secure the site of a powerful car bomb explosion
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Police and civilians killed in blast just outside Cairo
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Source thought to be pick-up truck loaded with explosives
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Government blames Muslim Brotherhood for the attack
Destruction: A damaged building is surrounded by worried @placeholder after a car bomb exploded today