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.
|Conte laments Italy World Cup failure|
|Amiens 1 Monaco 1: Jovetic rescues point but champions give PSG boost|
|Stuttgart 2 Borussia Dortmund 1: Bosz pressure builds after more Burki mishaps|
|Sunderland target Coleman steps down as Wales manager|
|Conte´s wife tells him to grow a beard – Conte grows a beard|
|Simeone rules out Everton job, promising ´a couple of years at least´ at Atletico|
|Pique to miss Barcelona´s Leganes trip over personal matter|
|UEFA closes Roma ´monkey chanting´ case|
|Don´t worry about Messi renewal, Valverde tells Barcelona fans|
|´Griezmann? We´ll see´ – Valverde won´t rule out Barcelona pursuit of Atletico star|
|Unsworth surprised to see Allardyce snub Everton|
|Mourinho has ´immense respect´ for Benitez|
|Howe backs Defoe to make World Cup squad|
|Everton speculation out of my control - Silva focusing on Hornets|
|Conte concerned by Manchester City´s breakaway lead|
|Man City results ´perfect´, but Guardiola demands improvement|
|David Luiz back in Chelsea squad, Conte confirms|
|Recovered Klopp offers Liverpool fitness update|
|Guardiola confident Aguero in ´perfect´ condition despite hospital trip|
|Ibrahimovic, Pogba and Rojo back for Manchester United|
|Heynckes compiling list of potential successors|
|Modric & Carvajal fit for Madrid derby|
|Bayern begin talks over Wagner deal|
|Pulis angered as Chadli sidelined for ´foreseeable future´|
|Neymar to join Ronaldo at Real Madrid? Zidane speaks out on PSG star|
|Guardiola & Sane complete Man City award double|
|Brave Chapecoense secure top-flight status|
|Tottenham have overtaken Arsenal as north London´s best - Sherwood|
|Brisbane Roar 3 Melbourne City 1: Papadopoulos at the double as hosts finally win|
|Seaman: Wenger must start Lacazette against Tottenham|
|I am more than just a goal machine - Ronaldo ignores Real Madrid criticism|
|Skriniar not interested in Barcelona speculation|
|France need Benzema, says Aulas|
|Van Dijk could leave Southampton in January|
|Sanchez snubbed Barcelona switch - Osorio|
|Atletico Madrid v Real Madrid: Simeone and Zidane face dangerous, defining Derbi|
|Aubameyang baffled by Dortmund suspension|
|Pochettino lauds Wenger longevity as he eyes 20 years at Spurs|
|Ronaldo: Real Madrid don´t fear PSG|
|Zenit´s Mancini not thinking about Italy job|
|Wenger advises Pochettino to fight the ´fear´ of winning trophies|
|Ronaldo: I want seven Ballons d´Or... and seven children!|
|Howedes ready for long-awaited Juventus debut|
|Bayern´s Wagner interest confirmed by Nagelsmann|
|Dyche ´amazed´ at persistent Everton talk|
|Manchester United post record first-quarter revenues|
|Hodgson confident Benteke will be fit for Everton clash, unsure over Loftus-Cheek|
|Klopp returns to Liverpool training after hospital visit|
|Moreno urges Coutinho to reject Barcelona switch|
|Hamsik refuses to be distracted by Maradona record|
|CAS rejects Adrien Silva´s appeal|
|Aubameyang dropped by Dortmund for ´disciplinary reasons´|
|Aguero declares himself fit to face Leicester City|
|If Griezmann isn´t committed, he should leave – Koke|
|Knee surgery to sideline PSG´s Motta|
|Kane the same as Lewandowski, Eboue proclaims|
|Let Neymar focus on football - Emery|
|Spurs quartet return but Alderweireld set for longer absence|
|Ibrahimovic eyes different role on Manchester United return|
|Transfer target Messi was beyond Manchester City, says Robinho|
|´Ultimate defender´ Zouma one of Premier League´s best, claims Shawcross|
|Cantona baffled by Neymar´s PSG move|
|Loftus-Cheek must return to Chelsea, says Willian|
|Central Coast Mariners 1 Adelaide United 2: Kitto snatches dramatic win|
|Cazorla´s fitness woes the worst injury Wenger has known|
|Wenger trusts Lacazette completely|
|Atletico Madrid v Real Madrid: Demolition derbies, Raul´s revenge and other memorable capital clashe|
|Mourinho: Ibrahimovic will return in 2017|
|Spain and England at risk as World Cup draw pots confirmed|
|Atletico Madrid v Real Madrid: Cristiano Ronaldo, King of El Derbi|
|Gareca: World Cup spot is for the Peruvian people|
|World Cup: The 32 qualified teams|
|Peru 2 New Zealand 0 (2-0 agg): South Americans qualify for World Cup after 36-year wait|
|Ronaldo congratulates Corinthians on seventh Brazilian title|
|Van Dijk focused ahead of Liverpool clash – Pellegrino|
|Ravanelli: I´d bend over backwards to bring back Conte|