The Saudi king has ordered a review into safety at the hajj following a stampede which resulted in the deaths of 717 people.

Another 863 were injured in the pilgrimage's deadliest incident for 25 years. Indeed, tragedies are far from rare in Mecca.

Read more: > A timeline of disasters at annual Muslim pilgrimage since 1975

The worst disaster to strike the hajj in modern times occurred on 2 July 1990 when 1,426 people were killed in a stampede in an overcrowded tunnel.

This chart shows the death toll from tragedies at the hajj from 1975 to 2015.