A man was arrested at Heathrow Airport after a chaotic incident involving a group of men and a 'pepper spray' attack. The incident unfolded at Terminal 3's multi-storey car park, causing panic and disruption for travelers. Multiple people were sprayed with a form of pepper spray, leading to injuries that were not life-threatening. The Metropolitan Police, who arrived at 08:11 am, are treating the incident as an isolated event, unrelated to terrorism or protests. The arrested man remains in custody, and authorities are searching for other individuals involved. The incident resulted in increased police presence, travel delays, and a significant armed police deployment, including fire crews and emergency services. Heathrow Airport advised travelers to plan for extra time and check with their airlines for updates. The London Fire Brigade was also called to the scene, and the Heathrow Express and sections of the Elizabeth Line experienced suspensions and delays. The incident highlights the importance of public safety and the swift response of emergency services in such situations.