A Pair of Arrests Following London Heathrow Irritant Spray Incident

An additional two individuals are now in custody related to a theft at London's Heathrow Airport where 21 people sustained injuries by a substance believed to be an irritant spray, as stated by law enforcement.

A man, 24, was arrested in Lambeth on suspicion of theft and assault and a 23-year-old woman was arrested on suspicion of conspiracy to commit robbery. They both are still being held, the force said.

These detentions come after an investigation into an assault at the multi-level parking garage at Terminal 3 on Sunday. Before the incident, two women had stolen from them their luggage upon exiting a parking garage elevator.

A toddler aged three was among the those hurt during the incident. A total of five individuals went to hospital for medical care and have since been released.

Police arrested 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 alerted at about 08:10 GMT following reports of a number of people injured by a noxious substance thought to be pepper spray.

The attack - an event that authorities stated was isolated and not being treated as an act of terror - caused train delays and the temporary shutdown of the main airport tunnel and the T3 parking facility briefly.