King promises to find cause of crane tragedy

Saudi Arabia's King Salman vowed on Saturday to find out what caused a crane collapse that killed 107 people at Mecca's Grand Mosque ahead of the annual hajj pilgrimage.

The hajj, a pillar of the Muslim religion which last year drew about 2 million faithful, will take place despite Friday's tragedy, Saudi authorities said as crowds returned to pray a day after the incident.

Hundreds of thousands of pilgrims had already arrived in Mecca when the massive red and white crane toppled over during a thunderstorm on Friday.