An additional two individuals are now in custody related to a theft at London's Heathrow Airport in which 21 people were injured by a substance believed to be an irritant spray, according to police.
A man, 24, was arrested in Lambeth for suspected 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 an investigation into an assault at the multi-level parking garage at Heathrow's Terminal 3 on Sunday. Before the attack, two women were robbed of their suitcases upon exiting a parking garage elevator.
A toddler aged three was one of the those hurt in the event. Five people went to hospital for medical care and were later discharged.
Officers detained a man in his thirties for suspected theft and assault near the scene. He was subsequently released pending further inquiries while inquiries continue.
Authorities were called at about 8:10 in the morning GMT following reports of a number of individuals hurt by an irritating chemical believed to be an irritant spray.
The assault - which authorities stated was isolated and not considered an act of terror - resulted in delays to rail services and the partial closure of the Central Terminal Area tunnel and the T3 parking facility briefly.
