Dundee United have warned fans that there is a "zero tolerance" approach to the use of pyrotechnics following an incident at their most recent league match.

United supporters let off smoke bombs at Tannadice during Friday's Premiership match against Celtic.

The incident was the latest of several around Scottish grounds that have led to a focus on supporter behaviour and questions over whether authorities should introduce a "strict liability" approach to the issue.

United have now issued a statement which, though making no direct reference to Friday's match, warns fans of the consequences of bringing pyrotechnics into football grounds.

A club statement read: "Dundee United would like to remind supporters about a zero tolerance policy with regard to the use and carrying of pyrotechnics.

"The use of pyrotechnics, including smoke bombs and flares, within football stadiums is extremely dangerous and a serious offence.

"Any supporter identified to have committed such an act will be banned by the club and also subject to the possibility of criminal prosecution.

"Dundee United Football Club will work closely with the police, security and football authorities to eradicate this, and other, types of spectator misconduct.

"We would also like to remind supporters that if there are incidents of this nature in the future the football authorities have the power to impose serious sanctions including financial penalty and order matches to be played behind closed doors.

"The club urges all supporters to assist us in this matter and help end this unacceptable behaviour."

Celtic recently banned three supporters from attending matches after flares were used during a Scottish Cup tie at Stranraer and claimed their actions "caused embarrassment" to the club.

The Scottish Professional Football League is also considering a delegate's report of offensive chanting by Rangers supporters at their Championship game with Hibernian at the end of December. Flares have also been seen at other Scottish football grounds throughout the season.