Egypt ? Massive boulders crashed down on a shantytown on the outskirts of Cairo on Saturday, killing at least 24 people and burying many more under tons of rubble, Egyptian authorities said.

At least eight boulders, some the size of small houses, peeled away from the towering Muqattam cliffs and buried about 50 homes in the slum, one of many densely populated shantytowns ringing the city of 17 million. Manshiyet Nasr is home to 1.2 million people, according to Haidar Baghdadi, the parliamentarian for the region.

A security official said 35 people were injured and many more may be buried under hundreds of tons of rock that fell. He spoke on condition of anonymity because he was not authorized to speak to the media.