An additional two individuals are now in custody related to a theft at Heathrow Airport where over twenty individuals sustained injuries by a substance believed to be an irritant spray, as stated by police.
A 24-year-old man, was arrested in Lambeth on suspicion of robbery and assault and a woman, 23 was arrested on suspicion of conspiracy to commit robbery. Both individuals are still being held, authorities confirmed.
The arrests come after a probe into an attack at the multi-storey car park at Heathrow's Terminal 3 on Sunday. Before the attack, two women had stolen from them their luggage after getting out of a car park lift.
A three-year-old girl was one of the those hurt during the incident. A total of five individuals were taken to the hospital for medical care and were later released.
Police detained a 31-year-old man for suspected robbery and assault near the location. He was subsequently released under investigation while inquiries continue.
Police were alerted at approximately 08:10 GMT following reports of several individuals injured by an irritating chemical believed to be pepper spray.
The attack - which authorities stated was isolated and not considered an act of terror - caused train delays and the temporary shutdown of the main airport tunnel and the Terminal 3 car park briefly.