Arsenal says they will remind their players of their "responsibilities" after several were caught inhaling nitrous oxide.

Mesut Ozil, Pierre-Emerick Aubameyang, Alexandre Lacazette and Matteo Guendouzi were caughton CCTV inhaling nitrous oxide, commonly known as 'laughing gas', from balloons. The footage was then published by The Sun.

And the north London club has vowed to question the quarter over the incident.

A club statement read: "The players will be spoken to about this and reminded of their responsibilities as representatives of the club."

The incident occurred at a nightclub in August, with Shkodran Mustafi, Sead Kolasinac and Henrikh Mkhitaryan also present.

The 'laughing gas' is legal to possess, but illegal to give away or sell it to others.