Saudi Arabia's King Salman has ordered a safety review for the Hajj pilgrimage after at least 717 people died in a stampede near theholy city of Mecca.
Another 863 people were injured in the incident at Mina, which occurred as two million pilgrims were taking part in the Hajj's last major rite.
It is the deadliest incident to occur during the pilgrimage in 25 years.
The king said there was a need "to improve the level of organisation and management of movement" of pilgrims.
The crush occurred after two massive lines of pilgrims converged on each other from different direction at an intersection close to the five-storey Jamarat Bridge in Mina.
As part of the Hajj, pilgrims travel to Mina, a large valley about 5km (3 miles) from Mecca, to throw seven stones at pillars called Jamarat, which represent the devil. The pillars stand where Satan is believed to have tempted the Prophet Abraham.
The crush is the second disaster to strike in two weeks, after a crane collapsed at the Grand Mosque in Mecca, killing 109 people.