The Arsenal players who were reportedly inhaling nitrous oxide, aka "hippy crack" at a nightclub during the summer will be "reminded of their responsibilities as representatives of the club", a Gunners spokesman said.
Mesut Ozil, Pierre-Emerick Aubameyang, Alexandre Lacazette and Matteo Guendouzi were caughton CCTV inhaling nitrous oxide, commonly known as "laughing gas", from balloons.
Nitrous oxide slows down the brain and the body's responses, giving users a feeling of euphoria and can cause hallucinations, but can also lead to headaches, dizziness and paranoia.
Other players such as Raheem Sterling and Kyle Walker have been seen using the gas in the past, with the City fullback apologising for using the substance back in 2013.
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After seeing the video, an Arsenal spokesperson told BBC Sport that players would be "spoken to and reminded of their responsibilities".
Gunners stars Henrikh Mkhitaryan, 29, and Shkodran Mustafi, 26, are also apparently in the footage but are not seen with the balloons.
Possession of the drug is not illegal in the United Kingdom, but its sale and production is restricted.
The incident took place in August, just before the start of the season, when a number of the London club's squad members enjoyed a night out at Tape Club.

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