Passengers on the Jubilee line reported seeing a group of youths fighting with knives on the platform of Queensbury station at 5.30pm yesterday (March 24).
Police arrived at the scene and a 16-year-old boy was arrested on suspicion of possession of a bladed article and possession of a Class B drug.
No other arrests have been made, but an investigation is ongoing.
A British Transport Police spokesperson said: “Officers were called to Queensbury underground station at around 5.30pm yesterday (24 March) to reports of a fight involving knives on the platform.
“Officers attended and one boy aged 16 was arrested on suspicion of possession of a bladed article and possession of a drug (Class B).
“Enquiries into the incident are ongoing and anyone with information is asked to get in touch by texting 61016 or calling 0800 405040 quoting reference 490 of 24/03/25.”