Two more people are now in custody related to a theft at Heathrow Airport in which 21 people sustained injuries by what is thought to be an irritant spray, according to law enforcement.
A man, 24, was arrested in Lambeth on suspicion of robbery and assault and a 23-year-old woman was detained 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 Heathrow's Terminal 3 on Sunday. Before the attack, a pair of female travelers were robbed of their luggage after getting out of a car park lift.
A toddler aged three was among the those hurt during the incident. Five people went to hospital for treatment and have since been discharged.
Officers detained a man in his thirties on suspicion of theft and assault near the location. He has since been 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 pepper spray.
The attack - which authorities stated was isolated and not considered terrorism - caused train delays and the temporary shutdown of the Central Terminal Area tunnel and the Terminal 3 car park briefly.
