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MECCA, SAUDI ARABIA - SEPTEMBER 11: At least 52 worshippers are killed and others injured when storms caused a crane to fall in Mecca's Grand Mosque on Friday, September 11, 2015. Millions of Muslim converge on Mecca to perform the sacred pilgrimage. A huge construction crane buffeted by strong winds collapsed and crashed through the roof of the Grand Mosque in Mecca Friday, the Saudi Arabia Civil Defense reports. Search and rescue teams and medical workers from the Saudi Red Crescent have been sent to the scene. (Photo by Ozkan Bilgin/Anadolu Agency/Getty Images)
MECCA, SAUDI ARABIA - SEPTEMBER 11: At least 52 worshippers are killed and others injured when storms caused a crane to fall in Mecca's Grand Mosque on Friday, September 11, 2015. Millions of Muslim converge on Mecca to perform the sacred pilgrimage. A huge construction crane buffeted by strong winds collapsed and crashed through the roof of the Grand Mosque in Mecca Friday, the Saudi Arabia Civil Defense reports. Search and rescue teams and medical workers from the Saudi Red Crescent have been sent to the scene. (Photo by Ozkan Bilgin/Anadolu Agency/Getty Images)

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    Video shows moment crane collapses in Mecca

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Video shows moment crane collapses in Mecca

Video posted to social media shows the moment a crane collapsed at Saudia Arabia's largest mosque and killed dozens of people. CNN's Isha Sesay reports.

Video shows moment crane collapses in Mecca

Video posted to social media shows the moment a crane collapsed at Saudia Arabia's largest mosque and killed dozens of people. CNN's Isha Sesay reports.