(LONDON) — A man was arrested on Sunday after a “group of men” unleashed what may have been pepper spray during an altercation in a parking garage at London’s Heathrow Airport, the police said.

The incident was not being investigated as terrorism, Cmdr. Peter Stevens, of London’s Met Police, said in a statement. Officers were called just after 8 a.m. local time to the parking garage at the airport’s Terminal 3, where there were reports of “multiple people being assaulted,” the department said.

“A number of people were sprayed with what is believed to be a form of pepper spray by a group of men who then left the scene,” the police said.

The man who was detained, who was not immediately identified, remained in custody on suspicion of assault, the police said.

“At this stage, we believe t

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