Celtic have urged their fans to stop setting off fireworks and pyro during European ties after they were charged with another UEFA offence.

The Hoops face another sanction after supporters let off flares in the Green Brigade area of the ground.

Last month they were forced to pay £11,000 for two charges in their 4-1 win over AIK.

It was the 17th time Celts have been fined by the governing body since 2007.

In an official club statement, the club begged fans to stop or risk further, harsher punishment.

The statement read: "Following  the latest UEFA charge against the Club for the use of fireworks at Celtic Park, it is with real disappointment and frustration that the Club needs to appeal again for this behaviour to stop.

"UEFA’s stance on the issue of pyrotechnics is unequivocal and very well-known. 

"The Club has been sanctioned on numerous occasions and yet, very disappointingly, this behaviour by a small minority persists.

"The serious safety concerns associated with such behaviour are obvious, as is the reputational damage which this behaviour and these charges have on the Club. In addition, the numerous financial penalties placed on Celtic continue to come out the pockets of supporters who invest in the Club. 

"Celtic will be introducing further measures in order to deal with this behaviour. It has to stop.

"The club does not want it, our supporters do not want it and UEFA will continue to punish the Club whenever it occurs as it is a clear breach of their regulations. It really is as simple as that.

"Given the number of repeated offences, we should also be very aware that there could be further, very serious repercussions which could have hugely detrimental consequences for the Club and our supporters. 

"It is hugely unfair that the enjoyment of Celtic matches could potentially be affected by the negative behaviour of a tiny minority.

"Additionally, in the interests of all our supporters’ safety, it is imperative that all fans when attending matches at Celtic Park use their designated seat. This is important in ensuring a safe environment."

It continued: "Our supporters are fantastic and we greatly value the huge contribution you make to the Club. It is the positive support of our fans which makes the difference, week in, week out.

"Our win against CFR Cluj last Thursday represented another great European night on the pitch for the Club. 

"Supported brilliantly by our fans, the team were magnificent in driving us to top of our Europa League group. This should be our focus.

"Neil Lennon, our players and our backroom team will be doing all they can to deliver a similar performance against Lazio. 

"The Club and our supporters need to work together to make sure pyrotechnics and any other form of unsafe behaviour have no place at our matches."

More follows.