Two more people have been arrested following the alleged “pepper spray attack” at London’s Heathrow airport on Sunday.
One man was arrested on the scene in the morning of December 7 when armed police dramatically stormed a multi-storey car park at Britain’s busiest travel hub.
He was then released under investigation while the Metropolitan Police continued their enquiries.
On Monday, a 24-year-old man from Lambeth was arrested on suspicion of robbery and assault and a 23-year-old woman on suspicion of conspiracy to commit robbery.
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The pair remain in custody, said Scotland Yard.
Sunday's incident saw the London Ambulance Service treating 21 people with injuries, including a three-year-old girl.
Five of the injured were taken to hospital, but their conditions are not believed to be life-changing or life-threatening.
Speaking on Sunday evening, Commander Peter Stevens said: "Our team have been working at pace today to review CCTV from the area and speak with witnesses at the scene.
Two more people have been arrested over the alleged 'pepper spray attack' on Sunday
|GETTY
"At this stage, it’s understood that a woman was robbed of her suitcase by a group of four men, who sprayed a substance believed to be pepper spray in her direction.
"This occurred within a car park lift, with those in the lift and surrounding area affected by the spray.
"Our officers are working to determine the full circumstances around what happened but we do believe this to be an isolated incident with those directly involved known to each other."
He continued: "We appreciate that this has been a concerning incident and I commend the actions of the emergency services and members of staff at Heathrow Airport."
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The incident led to dramatic scenes as armed police stormed a multi-storey car park
|TOM BATE
Eyewitness Tom Bate told GB News: "It was incredibly eerie because one at a time, everyone, including me, started coughing all at once. It felt like there was a burning at the back of our throats.
"There were children, there were elderly people...everyone just coughing and spluttering,"
Mr Bate was then shocked to see "20 armed officers come barreling through, looking really quite worried", which could be seen in footage he shared with The People's Channel.
By midday, dozens of passengers were waiting at the terminal’s bus stop for shuttles to the long-stay car park and elsewhere as the incident caused major travel delays.
One family, who did not wish to be named, said they had waited for three hours at the bus stop after their flight landed at around 8am.
Heathrow staff handed out bottled water to waiting passengers on Sunday afternoon.
A Heathrow spokesman said: "The shuttle buses to the long-stay car park were impacted by congestion on the roads following an earlier incident which saw the Central Terminal Area tunnel closed for safety reasons.
"The buses are now operating as normal and we apologise for any inconvenience caused."
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