Spartak Moscow are likely to face a UEFA investigation after supporters fired a flare that narrowly missed the referee during their 1-1 draw at Maribor in the Champions League.
The Russian champions had survived Maribor's lively start to the game when a firework projected from the Spartak fans travelled more than half the length of the pitch and landed not far from referee Deniz Aytekin's feet.
Should the club be disciplined it will further compound their disappointment after Damjan Bohar's late equaliser denied them a winning return to the Champions League group stage after a five-year absence.
Second-half substitute Aleksandr Samedov gave Spartak the lead just before the hour mark as smoke continued to billow from the area in which the visiting supporters were seated, but Bohar levelled the game with a fine finish in the 85th minute to spark wild celebrations from the home crowd.
Maribor will be hard pressed to take points from their remaining five Group E games - with matches against Liverpool and Sevilla to come - but coach Darko Milanic saw his charges put in a spirited performance that might have yielded more than just a point had they taken their chances.
Martin Milec drew an early save from Artyom Rebrov in the Spartak goal when he cut inside from the right flank in the first minute and struck a bouncing shot that the goalkeeper could only parry away.
Play swung from end to end in the game's early stages and Andrey Eshchenko blazed a shot over the crossbar after a dangerous run by Quincy Promes, but the home side were in the mood to attack and Valon Ahmedi let fly from 25 yards after 10 minutes, forcing another good save from Rebrov.
Spartak's quality began to show after 25 minutes when a flowing passing move saw Mario Pasalic freed Promes, whose flick put Eshchenko one-on-one with Jasmin Handanovic, but the winger lofted his shot high of the target.
Promes is Spartak's top goal-scorer this season and he almost added another to his tally with a dipping drive from 20 yards that flew just wide on the half hour mark, as Maribor ended the first half with little of the energy and verve they had shown early on.
Spartak brought on Samedov at half-time and four minutes into the second half he danced into the penalty before chipping a shot narrowly over the crossbar.
His introduction proved decisive 10 minutes later when he latched onto the rebound after Handanovic saved Fernando's shot and rifled the ball high into the net, prompting explosive celebrations from the Spartak supporters.
Bohar almost equalised immediately with a close-range header that Rebrov saved at full stretch, and Maribor full-back Mitja Viler sent an angled drive whistling past the post after 68 minutes as the hosts pushed hard to salvage a point.
Fernando should have made it 2-0 when Luiz Adriano teed him up for a one-on-one with Handanovic, but the Brazilian midfielder dragged his shot wide. Promes tried his luck with an audacious free-kick from 30 yards, but Handanovic rose well to save.
But Maribor never gave up and with five minutes left they were rewarded when Martin Kramaric played the ball out to Bohar on the left side of the Spartak penalty area and the midfielder unleashed an unstoppable drive into the far corner of the net to earn his side a precious point.
|WATCH: Sabalenka wins point using racquet throat|
|Federer, Djokovic and Zverev among Australian Open first-round winners|
|Kubica gets reserve role as Williams hire Sirotkin|
|Shambolic Stars out after Sixers thrashing|
|Wales pick uncapped Worcester wing Adams in Six Nations squad|
|Tevez: CSL spell was a holiday|
|Mignolet considering Liverpool future|
|Laidlaw among several returning stars in Scotland Six Nations squad|
|´Fairy tale´ 2017 motivation for Federer|
|Fred waiting for Guardiola call amid Man City speculation|
|Dominant Federer makes light work of Bedene|
|Halep faces nervous wait over ankle injury|
|Inter confident but patient over Rafinha|
|Kohli fined after umpire outburst|
|Djokovic hits back at Australian Open boycott suggestions|
|De Grandhomme lifts Black Caps to win in Taylor´s 200th ODI|
|Giggs had counselling after Old Trafford exit|
|Durant continues dominance over Cavs as Warriors win|
|Halep survives scare and rolled ankle at Melbourne Park|
|Westbrook ejected against Kings after arguing call|
|Djokovic eases past Young on return|
|Sharapova staying grounded after Melbourne win|
|Neville: Mourinho would happily swap Mkhitaryan for Sanchez|
|Raonic suffers surprise loss in Melbourne|
|Sharapova wins on return to Australian Open|
|Pirates send McCutchen to Giants|
|Man United becoming Pogba´s team – Mourinho|
|Saints, Steelers coaching staffs to lead Pro Bowl teams|
|LeBron says we cannot let racism ´conquer us as people´|
|Super Bowl hopeful Belichick cautiously preparing for Jaguars|
|Cardinals veteran Yadier Molina: Three more years before retirement|
|The best finishes in NFL playoff history - Where does Keenum & Diggs´ Minneapolis miracle rank?|
|Can ´talking with everyone´ but hints at Liverpool stay|
|Mourinho ´not unconfident´ Manchester United will sign Sanchez|
|Pogba warns City that United will not give up the chase|
|Assist king Pogba matches De Bruyne, Sane despite injury and suspension|
|Manchester United 3 Stoke City 0: Valencia, Martial and Lukaku trim gap at the top|
|Shaw feeling on top of his game amid United run|
|Ulster and Ireland wing Bowe to retire|
|Mkhitaryan left out by Manchester United amid Arsenal talk|
|Inter secure Lopez on loan from Benfica|
|Hurst marvels at hat-trick maestro Kane|
|WATCH: Neymar nutmegging for fun in PSG training|
|Best eager to sort out Ireland future|
|Bastareaud and Haskell to learn fate on Wednesday|
|Nantes´ Carlos has red card overturned after being kicked by referee|
|De Villiers leads Proteas´ recovery following imperious Kohli century|
|´Logical´ for Aubameyang to stay at Dortmund, says Stoger|
|Di Resta out of Williams running|
|Stokes ´keen´ for court appearance after affray charge|
|Titans part ways with Mularkey|
|Stupid not to - Giggs seeks Fergie´s advice upon taking Wales job|
|Young hails Wasps´ capture of ´world class´ Sopoaga|
|England all-rounder Stokes charged with affray|
|Nadal expects to get better in Melbourne|
|Suarez feared Chiellini bite would derail Barca transfer|
|Dortmund sign reported Man United target Akanji|
|Short stars again in Hurricanes´ fifth straight win|
|Bangladesh trounce Zimbabwe in tri-nations opener|
|Wales confirm Giggs appointment|
|Barcelona´s Dembele out for up to four weeks|
|Nadal through as five seeds fall in Australian Open first round|
|Williams, Stephens out as American women stumble at Australian Open|
|Wozniacki not getting carried away as seeds tumble|
|Struggling Stoke appoint Lambert|
|Referee suspended until further notice after kicking Nantes´ Carlos|
|Mercedes lead tributes to Gurney|
|Coutinho´s ´deserved´ Barca move, says Figo|
|Toulon stand by Bastareaud after alleged homophobic slur|
|Burgos no match for sensational Nadal|