A crane collapsed Friday at one of Islam 's most important mosques - the Masjid al-Haram in Mecca - killing at least 65 people and injuring 154 others, Saudi Arabian authorities said Friday on Twitter.
There was no immediate comment about the cause of the collapse.
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.
The Hajj is due to begin later this month.