🔗 Share this article Two Arrests Following Heathrow Irritant Spray Incident The assault caused the temporary closure of the CTA tunnel and the Terminal 3 car park. Two more people are now in custody related to a robbery at London's Heathrow Airport in which 21 people sustained injuries by what is thought to be pepper spray, according to police. A 24-year-old man, was taken into custody in the Lambeth area on suspicion of theft and assault and a 23-year-old woman was arrested on suspicion of conspiring to commit a robbery. They both remain in custody, the force said. These detentions come after a probe into an assault at the multi-level parking garage at Terminal 3 on Sunday. Before the attack, a pair of female travelers were robbed of their suitcases upon exiting a car park lift. A three-year-old girl was among the injured in the event. A total of five individuals were taken to the hospital for treatment and have since been released. Officers detained a 31-year-old man for suspected robbery and assault near the scene. He has since been released under investigation while inquiries continue. Authorities were alerted at approximately 08:10 GMT after reports came in regarding a number of people hurt by an irritating chemical thought to be pepper spray. The assault - an event that police said was a standalone incident and not being treated as terrorism - resulted in delays to rail services and the partial closure of the Central Terminal Area tunnel and the T3 parking facility briefly.