An additional two individuals are now in custody in connection with a theft at London's Heathrow Airport in which over twenty individuals were injured by what is thought to be an irritant spray, according to law enforcement.
A man, 24, was arrested in the Lambeth area on suspicion of robbery and assault and a 23-year-old woman was detained on suspicion of conspiracy to commit robbery. They both remain in custody, the force said.
These detentions come after a probe into an assault at the multi-level parking garage at Terminal 3 this past Sunday. Prior to the incident, two women were robbed of their luggage after getting out of a parking garage elevator.
A three-year-old girl was among the injured during the incident. A total of five individuals went to hospital for medical care and were later discharged.
Police arrested a 31-year-old man for suspected theft and assault close to the scene. He has since been released under investigation while inquiries continue.
Authorities were called at approximately 8:10 in the morning GMT following reports of a number of people hurt by a noxious substance thought to be an irritant spray.
The attack - which police said was a standalone incident and not being treated as terrorism - caused train delays and the partial closure of the main airport tunnel and the T3 parking facility for a short time.
