Glasgow - Celtic have responded to their latest UEFA charge by appealing to their fans for help identify those responsible for setting off fireworks at Inter Milan's San Siro stadium.
The Scottish champions received the charge from European football's governing body for the incident in Milan two days after being fined for an identical offence in their previous Europa League trip against Dinamo Zagreb.
The Hoops were also hit with another charge for their team's behaviour in the 1-0 Europa League second-leg defeat by Inter on Thursday.
Celtic will contest the "improper conduct" charge which was sparked by their card count in the away leg.
But their biggest concern is to stamp out the trend in lighting flares at away games after being hit with a seventh UEFA charge for fan behaviour in little over three years.
Celtic had appealed for fans to behave at the San Siro after being fined 10,000 euros (approximately 7,300) on Wednesday after a supporter let off a flare during their group match against Dinamo Zagreb in Croatia.
But pyrotechnics were evident in the visiting section in Milan and both clubs have received the same charge.
A Celtic statement read: "Unfortunately, one or two individuals have again damaged the club they claim to support, resulting in a further UEFA charge for the use of flares.
"Today we have been inundated with support from Celtic fans who want an end to this activity and, like the club, do not want those responsible associated with Celtic in any way.
"We would urge anyone with information on who these people are to get in touch with the club so that we can deal with this matter and get back to celebrating all that is great about our club."