Arsenal have reacted to a video published by The Sun which showed players inhaling "Laughing Gas".
The Sun report the players attend a private party at a London club in August.
CCTV footage shows players including Pierre-Emerick Aubameyang, Mesut Ozil and Matteo Guendouzi inhaling what is said to be nitrous oxide, also known as 'laughing gas' and 'hippy crack' from balloons.
However, A statement from Arsenal today read: "The players will be spoken to about this and reminded of their responsibilities as representatives of the club."
Shkodran Mustafi and Sead Kolasinac are also seen with balloons in their mouths, while Henrikh Mkhitaryan was present, but is not seen inhaling anything.
It is legal to posses Nitrous Oxide but it is illegal to give away or sell it to others.
Nitrous Oxide can lead to feeling of euphoria or calmness, and can also lead to fits of laughter - hence its nickname of 'laughing gas'.
It can also lead to headaches, dizziness and even paranoia.