An additional two individuals are now in custody in connection with a theft at Heathrow Airport where 21 people were injured by a substance believed to be pepper spray, according to law enforcement.
A 24-year-old man, was arrested in Lambeth on suspicion of theft and assault and a 23-year-old woman was detained for suspected conspiring to commit a robbery. Both individuals are still being held, authorities confirmed.
The arrests follow an investigation into an attack at the multi-storey car park at Heathrow's Terminal 3 this past Sunday. Before the incident, a pair of female travelers were robbed of their luggage upon exiting a car park lift.
A toddler aged three was one of the injured during the incident. Five people were taken to the hospital for medical care and have since been discharged.
Officers arrested a man in his thirties for suspected theft and assault close to the scene. He has since been released pending further inquiries while inquiries continue.
Police were called at about 8:10 in the morning GMT following reports of a number of people injured by an irritating chemical thought to be an irritant spray.
The attack - an event that police said was isolated and not considered terrorism - caused train delays and the temporary shutdown of the Central Terminal Area tunnel and the Terminal 3 car park for a short time.
