An additional two individuals have been arrested in connection with a robbery at London's Heathrow Airport where 21 people sustained injuries by what is thought to be pepper spray, as stated by police.
A 24-year-old man, was arrested in Lambeth on suspicion of robbery and assault and a 23-year-old woman was arrested for suspected conspiracy to commit robbery. They both are still being held, the force said.
The arrests come after a probe into an attack at the multi-storey car park at Heathrow's Terminal 3 this past Sunday. Prior to the incident, a pair of female travelers were robbed of their suitcases upon exiting a car park lift.
A three-year-old girl was among the those hurt during the incident. A total of five individuals went to hospital for treatment and have since been released.
Officers detained a 31-year-old man for suspected theft and assault near the location. He has since been released pending further inquiries as the investigation proceeds.
Authorities were called at about 08:10 GMT following reports of a number of people injured by an irritating chemical thought to be an irritant spray.
The attack - which authorities stated was isolated and not considered terrorism - resulted in train delays and the partial closure of the Central Terminal Area tunnel and the T3 car park briefly.