Several people have been reportedly treated for breathing difficulties after a gas leak at London Aquatics Centre on Wednesday (March 23).

Eyewitness video shows a police cordon in place and first responders on the scene, with the Aquatics Centre in view. A helicopter is also seen overhead as scores of reporters arrive on the scene.

One woman was seen by Newsflare's reporter leaving the scene with her baby. She said that she comes every week to the centre to swim with her baby and said there were "quite a few people" in the pool with their kids swimming and "everyone suddenly got evacuated."

The Queen Elizabeth Olympic Park tweeted: “There has been an incident
@AquaticsCentre this morning involving the release of a gas. The area has been cordoned off and evacuated. We're working with emergency services on site. There are a number of casualties with breathing difficulties being treated by @Ldn_Ambulance.”

Mayor of London Sadiq Khan tweeted: "I remain in close contact with our emergency services who are dealing with a gas-related incident at the London Aquatics Centre this morning.

"A number of people are being treated by @Ldn_Ambulance. Please avoid the area which has been cordoned off and evacuated."

A London Fire Brigade spokesperson said: “Due to a chemical reaction a high quantity of chlorine gas was released. London Ambulance Service are treating a number of patients. Around 200 people were evacuated from the centre. While we ventilate the premises we would ask those residents in the immediate vicinity to close doors and windows.”

The Aquatics Centre was one of the venues at the London 2012 Olympics.

Incident at Olympic Park pool in Stratford, east London - first responders on the scene

Helicopter seen overhead as reporters arrive on scene

200 people evacuated, 6 fire engines

Location: 51.538632,-0.008958 Pool St, London