POLICE found 'laughing gas' in a car after a teenage girl was knocked down in Musselburgh.

Officers were called to Inveresk Industrial Park at about 6.40pm last Wednesday after reports of someone having been hit by a car.

A 16-year-old girl suffered serious injury and was taken to Edinburgh Royal Infirmary for treatment, and released a short time later.

Enquiries carried out found a number of nitrous oxide canisters inside the vehicle.

A 17-year-old youth has been charged with alleged dangerous driving and the supply of a psychoactive substance.

A report has been sent to the Procurator Fiscal.

Chief Inspector Neil Mitchell, area commander, said: "Nitrous oxide, also known as laughing gas, is a psychoactive substance, which is illegal to supply or sell on.

"Users can also suffer various health implications including dizziness caused by lack of oxygen to the brain.

"Any intelligence received by East Lothian police in relation to the supply of this substance will be robustly investigated by local officers.

"Any member of the public with information should contact police on 101 or, alternatively, call Crimestoppers anonymously on 0800 555 111."