Aberdeen will write to UEFA to raise their concerns after one supporter was taken to intensive care with injuries sustained as he attended Thursday night's match against Atletico Madrid.

Aberdeen allege that Dons fan Ian Bremner's head wound was caused by being struck by a police baton.

The 38-year-old is "on the mend" according to Aberdeen, and no longer in intensive care, but the circumstances of his injury are set to be raised in the letter from the Scottish Premier League club.

Spanish police are also investigating the alleged rape of an Aberdeen supporter on Wednesday night in the centre of Madrid.

Dons officials stressed that no Aberdeen supporters were arrested in the Spanish capital during the violent street scenes, which were captured on video and have appeared on Spanish news websites.

A spokesman for Aberdeen said: "We are still in the process of documenting everything that occurred from the time of the draw until the conclusion of game and in particular the way in which some of our fans were treated outside the stadium.

"As a result of reports of trouble at the game, Duncan Fraser, John Morgan and Gordon Ritchie from AFC have remained in Madrid and, since last night, have been working closely with the British Consul and Grampian Police officers who were in Spain to ensure the safety of our supporters and also piece together exactly what happened.

"Duncan, John and Gordon this morning visited Ian Bremner (38), who lives in Denmark, and sustained a head wound inflicted by a police baton, resulting in his being rushed to hospital.

"Thankfully Ian is now out of intensive care and is on the mend and, as far as we can ascertain, he is the only supporter to have been hospitalised as a result of trouble while significantly, there are no reports of any Aberdeen fans being arrested."

The British Embassy in Madrid had earlier revealed three Aberdeen fans needed hospital treatment.

No further details were given about the three, although one is believed to have been injured accidentally and not directly because of the crowd trouble.

Aberdeen supporters travelled in large numbers to the match. An estimated 6,000 made the trip, despite the club being given an allocation of only 3,000.

The Pittodrie club claim Atletico should have allowed their visitors more tickets for the match, and will make that point to UEFA.

The spokesman for Aberdeen added: "The club repeatedly asked for additional tickets well in advance of the fixture and were informed that there were no more available, only for additional seats to be made available earlier this week via Atletico's website and with no prior warning to ourselves.

"Additionally, as recently as yesterday we were told at the official UEFA meeting that the match was a sell-out, and while there are always a few seats not taken at any game, as everyone could see, there were thousands of empty places in all areas of the stadium other than the ones allocated to visiting fans.

"As a result of our concerns for potential problems, we involved the Consul at an early stage and they have been aware of the relevant issues.

"Those, along with the reported mistreatment of Aberdeen supporters will form the basis of a detailed report that we will be submitting to the governing body over the course of the next few days."

Spanish media reported that at least 17 people suffered injuries during Thursday night's trouble, which saw bottles and other objects thrown.