Two more people are now in custody related to a theft at London's Heathrow Airport where 21 people were injured by what is thought to be an irritant spray, as stated by law enforcement.
A man, 24, was arrested in the Lambeth area for suspected theft and assault and a 23-year-old woman was arrested on suspicion of conspiring to commit a robbery. They both remain in custody, authorities confirmed.
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 were robbed of their luggage upon exiting a parking garage elevator.
A three-year-old girl was one of the injured during the incident. A total of five individuals were taken to the hospital for treatment and were later released.
Police detained a man in his thirties for suspected theft and assault near the location. He has since been released pending further inquiries as the investigation proceeds.
Police were called at approximately 08:10 GMT after reports came in regarding several individuals injured by an irritating chemical thought to be pepper spray.
The attack - which police said was isolated and not being treated as terrorism - caused delays to rail services and the temporary shutdown of the main airport tunnel and the T3 car park briefly.