A memorial service is being held to mark the 40th anniversary of the Ibrox disaster, which claimed the lives of 66 people.

The tragedy happened on January 2 1971 when fans were crushed on stairway 13 of the Rangers Football Club stadium at the end of an Old Firm game.

An eight-year-old boy was among those who perished in the incident as thousands of supporters were leaving the Glasgow ground. More than 200 other fans were injured.

A memorial service is being held at Ibrox and is being attended by relatives of the 66 who lost their lives.

They are joined by supporters, representatives of Rangers and Celtic Football Clubs and leading Scottish politicians.

On Sunday, Rangers played Celtic in another Glasgow derby at Ibrox - exactly 40 years to the day since the disaster. The match began with both sets of fans observing a minute's silence before kick-off.

The teams were led out by John Greig, who captained Rangers in the 1971 derby, and Billy McNeill, the Celtic captain of that era. Both sets of players wore black armbands for the match.