Coventry City FC working with police over anti-social behaviour from fans
The Sky Blues have reported an increasing number of incidents involving fans at home and away games.
Coventry City are reminding fans of behaviour expectations following further incidents at home and away games.
They have reported an increasing problem of drugs use and underage drinking by what they called a "small minority of supporters".
In a statement on the website, they said they will be working with police to identify and take action against them.
It follows a warning issued by the Sky Blues earlier this month regarding fan behaviour, including flares being thrown and abuse towards other supporters.
The statement said: "We know this is a minority of supporters whose behaviour is outlined above, but this is having a detrimental effect on other Sky Blues fans.
"Any supporters found to be taking part in this behaviour will be subject to action from the club and police."
"Any supporters found to be taking part in this behaviour will be subject to action from the club and the police, which can include behavioural programmes and club bans from home and away matches."
Dave Boddy, Coventry City Chief Executive, said: “We are aware of increased drug taking and usage at matches, and this has grown further in recent weeks.
“We work closely with police already on a number of fronts, and will be working proactively with them and other colleagues regarding this issue and identifying those supporters who are doing this.
“Alongside underage drinking and other behaviour outlined, it is disappointing we are having to put out this further warning to supporters.
“However, we are determined to ensure that the actions of a minority do not affect the majority of fans, whose support home and away is fantastic.
“Fans who are found to be taking part in this behaviour will be banned and will be liable to further action from the police.”