Two more people have been arrested in connection with a robbery at London's Heathrow Airport where 21 people were injured by what is thought 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, authorities confirmed.
The arrests come after an investigation into an attack at the multi-level parking garage at Terminal 3 on Sunday. Before the attack, a pair of female travelers were robbed of their luggage upon exiting a parking garage elevator.
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 were later released.
Officers detained a 31-year-old man on suspicion of theft and assault close to the scene. He was subsequently released pending further inquiries while inquiries continue.
Police were alerted at approximately 8:10 in the morning GMT after reports came in regarding a number of people hurt by a noxious substance thought to be an irritant spray.
The attack - an event that authorities stated was a standalone incident and not being treated as an act of terror - caused train delays and the partial closure of the Central Terminal Area tunnel and the T3 parking facility for a short time.