Seven hundred people have been crushed to death in Mecca when a crowd stampeded during the annual muslim "hajj" or pilgrimage. Hundreds of others have been badly injured.
Last week 100 people died when a crane fell through the roof into the Grand Mosque.
In previous years hundreds have been killed by poor organisation and failures of the built infrastructure.
But why does Mecca have such a high mortality rate? Perhaps this motorway sign gives us a clue...