An additional two individuals are now in custody in connection with a robbery at London's Heathrow Airport where over twenty individuals sustained injuries by what is thought to be an irritant spray, according to police.
A man, 24, was taken into custody 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 remain in custody, the force said.
The arrests follow an investigation into an assault at the multi-storey car park at Terminal 3 on Sunday. Prior to the incident, a pair of female travelers had stolen from them their luggage upon exiting a parking garage elevator.
A three-year-old girl was one of the those hurt during the incident. Five people went to hospital for treatment and were later discharged.
Police detained a 31-year-old man on suspicion of theft and assault near the scene. He has since been released under investigation as the investigation proceeds.
Police were alerted at about 08:10 GMT following reports of several individuals hurt by a noxious substance thought to be pepper spray.
The attack - which police said was isolated and not considered an act of terror - caused train delays and the partial closure of the main airport tunnel and the Terminal 3 parking facility for a short time.