Two men hand themselves in after Oxford Circus incident

London's Oxford Circus underground station evacuated armed police on scene

The station is located on the city's busy Oxford Street, a shopping strip usually busy with pedestrians and heavy traffic.

Armed officers from BTP and the Met police attended the incident shortly before 5pm on Friday afternoon, after receiving "numerous" reports of shots fired.

They believe an altercation between two men on a tube platform sparked the mass panic, and are now appealing for witnesses to the incident, which was captured on CCTV.

Stuart Crichton, London Ambulance Service assistant director of operations, said paramedics treated several patients who sustained injuries while leaving Oxford Circus.

Police later said there was no evidence that shots had been fired.

The station was reopened, cordons removed and the area returned to normal, with the Royal Variety Performance at the nearby London Palladium going ahead as planned. Armed and unarmed officers are on scene and dealing along with colleagues from British Transport Police'.

A Metropolitan Police spokesman contacted by AFP said the details of the incident were not known yet.

Oxford Street erupted into chaos as panicked people ran for cover, according to Ian Pannell, ABC News' senior foreign correspondent, who was on the scene.

Selfridges later said the evacuation of its shop was a precautionary measure and there were "no reported incidents in store". Everybody turned round in sort of pandemonium and started trying to exit the Tube as quickly as possible.

The shooting had been notable as November 24 is considered one of the busiest shopping days in the country, meaning that thousands of people could possibly be on the streets when the shooting had happened.

"We were in the Kingdom of candies and then saw a massive crowd of people running and screaming".

'Updates will be provided as soon as we have them'.

London Mayor Sadiq Khan thanked the emergency services for their response and urged people to remain vigilant.

She also had two other young girls with her, one lagging behind the woman, and the other running free and being blocked by a police woman.

Anyone with any information can call BTP on 0800 40 50 40 or text 61016 citing reference 405 of 24/11.