Reading FC have said that a "small number" of season-ticket holders have been banned from attending matches following an incident at Arsenal on Tuesday night.
An investigation between Reading, Arsenal and Thames Valley Police is now taking place following the EFL Cup fourth round game, which the Gunners won 2-0.
A handful of Reading season-ticket holders were ejected from the Emirates Stadium during the match and have since been banned from buying any tickets to upcoming away matches, report Get Reading.
A statement from Reading FC read: "Reading __football Club were made aware of an isolated but allegedly extreme incident of foul and abusive behaviour from a small number of individuals who were among the away supporters at the Emirates Stadium on Tuesday night.
"Those in question were ejected from Arsenal’s stadium during the course of our EFL Cup tie against the Gunners and the club have worked closely with Arsenal Football Club and Thames Valley Police to identify those accused of serious allegations.
"Each of the individuals have been informed by Reading Football Club that their season tickets at Madejski Stadium have been suspended with immediate effect, pending the outcome of an ongoing investigation.
"During the course of this investigation, these individuals will not be welcome at Madejski Stadium nor will they be permitted to purchase tickets to any of our away fixtures.
"As the vast majority of our fans understand, behaviour of the nature which has been alleged is entirely unacceptable and not welcome in __football or within our community.
"It is also not what this football club expects of its supporters.
In pictures - Arsenal 2-0 Reading:
"Tomorrow (Saturday), we welcome Nottingham Forest to Madejski Stadium and we fully expect our fans’ exemplary behavioural record to be reinforced by the conduct of true supporters of Reading Football Club at what should be another entertaining Championship encounter.
"We remain immensely proud of our fans and the remarkable amount of time, energy and effort they put in to backing the manager, his coaching staff and the players both at Madejski Stadium and following our fortunes on the road."