Arsenal Football Club has said it will send it will speak to all the players involved in a viral video of players at an exclusive party using "hippy crack" balloons before the start of last season.
The Sun reported that boxes of "laughing gas" canisters were brought to the players' area of the club and that footage showed Özil, Aubameyang, Guendouzi and Lacazette inhaling the gas.
After seeing the video, an Arsenal spokesperson told BBC Sport that players would be "spoken to and reminded of their responsibilities".
Several players even appeared to lose consciousness after inhaling the gas.
Around 70 girls were invited to join the Arsenal stars in London's Tape club, as the party racked up a bill of nearly £30,000.
Arsenal started the campaign with consecutive defeats to Manchester City and Chelsea but have embarked on a brilliant 20-game unbeaten run under new boss Unai Emery.
Raheem Sterling was warned by Liverpool after footage emerged of him using the substance in 2015, and Kyle Walker apologised for a similar incident in 2013.
Arsenal, under new manager Unai Emery, are now fifth in the Premier League table and are unbeaten in 20 consecutive matches in all competitions.