SAUDIA ARABIA -- A crane collapsed Friday at one of Islam's most important mosques -- Mecca's Masjid al-Haram, or Grand Mosque -- killing at least 87 people and injuring 184 others.
No word on a cause.
The Masjid al-Haram surrounds Islam's holiest site, the Kaaba -- a shrine that worshipers visit during the Hajj, the annual pilgrimage to Mecca. Approximately 2 million people a year make the pilgrimage, which this year is due to begin around September 21 .
Pictures emerging from the site show what appear to be part of a crane on a floor, with debris strewn around it.