An additional two individuals are now in custody related to a robbery at London's Heathrow Airport where over twenty individuals were injured by what is thought to be an irritant spray, according to police.
A 24-year-old man, was taken into custody in the Lambeth area for suspected theft and assault and a woman, 23 was detained for suspected conspiracy to commit robbery. They both remain in custody, authorities confirmed.
These detentions follow an investigation into an attack at the multi-storey car park at Heathrow's Terminal 3 on Sunday. Prior to the attack, a pair of female travelers had stolen from them their luggage upon exiting a parking garage elevator.
A toddler aged three was among the those hurt in the event. Five people went to hospital for medical care and have since been released.
Police arrested a man in his thirties on suspicion of theft and assault close to the scene. He has since been released under investigation while inquiries continue.
Police were called at approximately 08:10 GMT following reports of several individuals injured by a noxious substance believed to be pepper spray.
The attack - which police said was a standalone incident and not considered an act of terror - resulted in delays to rail services and the temporary shutdown of the main airport tunnel and the Terminal 3 car park briefly.