An additional two individuals have been arrested related to a theft at Heathrow Airport where 21 people sustained injuries by a substance believed to be pepper spray, according to law enforcement.
A 24-year-old man, was taken into custody in the Lambeth area for suspected theft and assault and a 23-year-old woman was arrested for suspected conspiring to commit a robbery. They both remain in custody, authorities confirmed.
The arrests come after a probe into an assault at the multi-storey car park at Heathrow's Terminal 3 this past Sunday. Prior to the attack, two women had stolen from them their suitcases after getting out of a car park lift.
A toddler aged three was one of the those hurt during the incident. Five people were taken to the hospital for medical care and were later discharged.
Officers detained a man in his thirties on suspicion of theft and assault close to the location. He has since been released under investigation while inquiries continue.
Authorities were called at about 08:10 GMT following reports of a number of individuals injured by an irritating chemical believed to be an irritant spray.
The attack - which authorities stated was a standalone incident and not considered terrorism - caused train delays and the partial closure of the main airport tunnel and the T3 parking facility for a short time.