London's Heathrow Airport says its teams are working with emergency services after an incident in the multi-storey car park at Terminal 3. A number of people were sprayed with what is believed to be a form of pepper spray by a group of men, the Metropolitan Police said. One man is in custody on suspicion of assault, whilst further suspects are being sought by officers. The force says it is an isolated incident and not related to terrorism or protest. Tap the link in BBCNews's bio to read about related travel delays. #Heathrow #BBCNews