An additional two individuals are now in custody related to a robbery at Heathrow Airport in which over twenty individuals sustained injuries by a substance believed to be pepper spray, according to law enforcement.
A man, 24, was taken into custody in Lambeth on suspicion of theft and assault and a woman, 23 was arrested on suspicion of conspiracy to commit robbery. They both remain in custody, the force said.
These detentions come after an investigation into an assault at the multi-level parking garage at Terminal 3 on Sunday. Before the incident, a pair of female travelers were robbed of their luggage after getting out of a car park lift.
A toddler aged three was one of the those hurt during the incident. A total of five individuals went to hospital for medical care and have since been discharged.
Police arrested a 31-year-old man for suspected robbery and assault close to the location. He was subsequently released under investigation while inquiries continue.
Authorities were called at approximately 08:10 GMT following reports of a number of people injured by a noxious substance believed to be an irritant spray.
The assault - an event that authorities stated was a standalone incident and not considered terrorism - resulted in delays to rail services and the temporary shutdown of the Central Terminal Area tunnel and the Terminal 3 car park for a short time.