LONDON — Police arrested a man at London’s Heathrow Airport on Sunday after a crowd of people were hit with pepper spray during a robbery at a parking garage that caused several hours of travel disruptions.

Five people were taken by ambulance to a hospital and another 16, including a 3-year-old girl, were treated at the scene, officials said. None of the injuries was believed to be serious.

The incident in the Terminal 3 garage on the outskirts of London happened when a group of four men stole a woman’s suitcase in an elevator and sprayed her with an irritant, Metropolitan Police said.

Passenger Tom Bate said he saw three young men in black with their heads covered run from the elevator and then he experienced a burning sensation in his throat and immediately began hacking.

“Everyone i

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