An additional two individuals have been arrested in connection with a robbery at Heathrow Airport where 21 people were injured by a substance believed to be an irritant spray, according to law enforcement.
A 24-year-old man, was arrested in the Lambeth area for suspected robbery and assault and a 23-year-old woman was arrested for suspected conspiracy to commit robbery. Both individuals are still being held, authorities confirmed.
These detentions come after a probe into an assault at the multi-level parking garage at Heathrow's Terminal 3 on Sunday. Before the attack, a pair of female travelers had stolen from them their suitcases after getting out of a car park lift.
A toddler aged three was one of the injured during the incident. A total of five individuals went to hospital for treatment and have since been released.
Officers arrested a 31-year-old man for suspected robbery and assault near the location. He has since been released under investigation as the investigation proceeds.
Police were called at about 08:10 GMT after reports came in regarding several people hurt by an irritating chemical believed to be pepper spray.
The assault - an event that authorities stated was a standalone incident and not being treated as an act of terror - caused train delays and the partial closure of the main airport tunnel and the T3 car park for a short time.