Two more people are now in custody in connection with a robbery at Heathrow Airport where 21 people sustained injuries by what is thought to be pepper spray, as stated by police.
A man, 24, was taken into custody in Lambeth for suspected robbery and assault and a 23-year-old woman was detained for suspected conspiracy to commit robbery. They both remain in custody, the force said.
The arrests come after a probe into an assault at the multi-level parking garage at Terminal 3 this past Sunday. Prior to the attack, a pair of female travelers had stolen from them their suitcases after getting out of a car park lift.
A toddler aged three was one of the injured during the incident. A total of five individuals were taken to the hospital for treatment and have since been discharged.
Officers arrested a 31-year-old man on suspicion of robbery and assault near the location. He has since been released under investigation as the investigation proceeds.
Authorities were alerted at approximately 08:10 GMT following reports of several people hurt by an irritating chemical believed to be pepper spray.
The assault - an event that authorities stated was a standalone incident and not considered an act of terror - resulted in train delays and the partial closure of the main airport tunnel and the T3 car park briefly.