Two more people have been arrested in connection with a theft at London's Heathrow Airport where 21 people sustained injuries by what is thought to be pepper spray, according to police.
A 24-year-old man, was arrested in Lambeth for suspected theft and assault and a 23-year-old woman was arrested on suspicion of conspiring to commit a robbery. They both are still being held, the force said.
The arrests come after an investigation into an assault at the multi-storey car park at Terminal 3 on Sunday. Before the attack, two women were robbed of their suitcases after getting out of a car park lift.
A toddler aged three was one of the those hurt in the event. A total of five individuals went to hospital for treatment and were later discharged.
Officers arrested a man in his thirties for suspected theft and assault close to the scene. He was subsequently released under investigation as the investigation proceeds.
Authorities were alerted at about 08:10 GMT following reports of a number of individuals hurt by an irritating chemical thought to be an irritant spray.
The assault - an event that authorities stated was isolated and not considered terrorism - caused train delays and the partial closure of the Central Terminal Area tunnel and the T3 parking facility briefly.