Rangers midfielder Joey Barton is under investigation for allegedly breaking football betting rules.

PA Sport reports the controversial former Manchester City and Burnley midfielder was banned from the club on Monday for three weeks after a training ground altercation following the 5-1 defeat to Celtic.

The Scottish Football Association and the Gambling Commission are looking into claims that the 34-year-old bet on Celtic to suffer a heavy defeat to Barcelona last Tuesday night. Brendan Rodgers' side lost 7-0 in their Champions League Group C opener in the Nou Camp.

The SFA has a strict no-betting policy on football games. If found guilty Barton could face a ban but is unlikely to face a major punishment if the alleged gambling was restricted to one incident.