At least 453 people taking part in the Hajj pilgrimage have been killed in a stampede near the Islamic holy city of Mecca, officials in Saudi Arabia say.
Another 719 people were injured in the incident at Mina, which occurred as two million pilgrims were taking part in the Hajj's last major rite.
Preparations for the Hajj were marred when a crane collapsed at Mecca's Grand Mosque this month, killing 109 people.
The Saudi civil defence directorate said on Twitter that 4,000 personnel had been sent to the scene of Thursday's stampede, along with more than 220 emergency and rescue units. The injured are being taken to four hospitals in the area.
Photos published by the directorate showed rescue workers treating the injured on stretchers and loading them on to ambulances.
It said the victims were of "different nationalities", without providing details.
The civil defence directorate did not say what caused the stampede.