A disturbing incident unfolded at London's Heathrow Airport on Sunday, leaving a group of men affected by a substance believed to be pepper spray. Metropolitan Police officers were called to the scene at approximately [Time - if available in original, otherwise omit] to respond to reports of a dispute escalating into the deployment of the irritant.

Initial reports indicate that a group of men were affected by the substance, with the exact nature and extent of their injuries currently being assessed. Fortunately, no life-threatening conditions have been reported. A man was subsequently arrested at the scene and is being questioned by police. Details regarding the suspect's age and specific charges have not yet been released.

The parking garage was temporarily closed to facilitate the investigation and ensure public safety. Heathrow Airport, one of the world's busiest airports, sees a high volume of traffic through its parking facilities. Incidents of this nature are rare, but police are taking the matter seriously and conducting a thorough investigation to determine the full circumstances surrounding the event. Further updates will be provided as they become available. The investigation is ongoing.