Celtic could take action against the supporter who threw a coin at the Rangers doctor, Paul Jackson, during Wednesday's 2-1 home win at Parkhead.

An object, believed to be a coin, was thrown from the Jock Stein end of the ground as Dr Jackson oversaw treatment to the Rangers goalkeeper, Allan McGregor. The incident has been included in the report compiled by the referee, Kenny Clark, and also the Scottish Premier League match delegate, Alan Dick.

The issue has now been referred to the SPL for consideration but The Herald understands it is highly unlikely Celtic will be served with a financial penalty. The club will, however, be proactive in identifying the culprit and will also investigate the throwing of objects towards Barry Robson as he prepared to take a corner kick at the Rangers end.

Rangers banned a supporter for life when he was caught throwing an ice-filled drinks container at Stilyan Petrov in the Old Firm derby at Ibrox in April 2005. Celtic will consider a similar course of action after surveying CCTV footage.

In the same season, Fernando Ricksen, the former Rangers right-back, was hit with a coin at Pittodrie and a lighter at Celtic Park. The spate of incidents prompted the former president of the SFA, John McBeth, to threaten ground closure in an interview with The Herald. "I admit that it is not the most popular course of action but it is effective and if the situation is not addressed, then it is something we would have to consider," said McBeth. "If there is a justification, then the short, sharp, shock' tactic might be the best way to deal with it."

Drew Herbertson, the head of the Scottish FA's disciplinary committee, has also consulted with Clark to establish the full details of the brouhaha at the final whistle. David Weir and Gary Caldwell have been reported for violent conduct - effectively post-match red cards - and will miss their clubs' next matches.

Caldwell will be suspended for Saturday's league match against Aberdeen, while Weir will be ineligible for Sunday's Scottish Cup semi-final against St Johnstone.

Neither Rangers nor Celtic will exercise the right of appeal so that both will be available for the final Old Firm derby of the season, at Parkhead next Sunday. Carlos Cuellar will miss the concluding derby through suspension after he was red-carded for handling Shunsuke Nakamura's net-bound shot in the second half on Wednesday.

Stephen McManus was also cautioned for his altercation with Barry Ferguson. The two captains collided, with television evidence showing McManus to have aimed a swing at Ferguson, who retaliated angrily. McManus' booking takes him to the 15-point threshold and one more caution will lead to an automatic ban.