Ambulance services say several “casualties” are being treated after a “high quantity of chlorine gas” leaked at a major park in East London.

 The official Olympic Park twitter stated earlier this afternoon that: “There are a number of casualties with breathing difficulties being treated by @Ldn-Ambulance”.

“We are responding to an incident at Queen Elizabeth Olympic Park and have a number of resources on scene. More updates to follow,” they went in.

London Mayor Sadiq Khan has commented: “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 London Ambulance Service. Please avoid the area which has been cordoned off and evacuated.”