The following is a chronology of some major tragedies linked to the Hajj in recent years:
1979 - About 250 Saudi militants take over Grand Mosque in Mecca. More than 100 of them and 127 Saudi troops are killed in a two-week siege, which took place outside main pilgrimage season.
1987 - Some 400 people, mainly Iranian Shi'ia pilgrims, are killed in clashes with Saudi security forces during anti-Western protests in Mecca.
1989 - Bombs explode near Grand Mosque, killing one pilgrim and wounding 16. Saudi Arabia beheads 16 foreigners found guilty of planting the bombs.
1990 - Stampede in tunnel at Mecca causes deaths of 1426 pilgrims, most from Indonesia and Turkey.
1991 - Plane crash in Saudi Arabia kills 91 Senegalese soldiers returning from trip to Mecca after serving in Gulf War.
1991 - Plane carrying pilgrims home to Nigeria crashes after hajj, killing 261.
1994 - Stampede near Jamarat Bridge in Mena kills 270.
1997 - Fire kills 343 pilgrims at camp in Mena.
1998 - Stampede near Jamarat Bridge kills 119.
2001 - Stampede near Jamarat Bridge kills 35.
2003 - Stampede near Jamarat Bridge kills at least 14.
2004 - Stampede near Jamarat Bridge kills at least 251.
2006 - Collapse of Makka hostel housing pilgrims kills 76.