(Adds details of police probe into on-field fight)
May 31 (Reuters) - Rangers failed in their bid to return to the Scottish Premier League after a turbulent few years when they were thrashed 6-1 on aggregate by Motherwell in the promotion playoff final.
Motherwell, who finished second-bottom in the 12-team top flight, won Sunday's second leg 3-0 at home with second-half goals from Marvin Johnson, Lionel Ainsworth and John Sutton.
Rangers, who came third in the Championship (second tier) behind Edinburgh sides Hearts and Hibernian, were put into administration and liquidation in 2012 before being forced to re-enter in the lowest professional league in Scotland.