Car driver stopped by police on Westminster Bridge on Thursday

Footage has emerged of a police officer questioning two men after he stopped them on Thursday night on Westminster Bridge in London, UK.

According to the filmer, they were "driving in a manner that alerted the police".

"Due to recent events the officer took no chances," he added.

On Wednesday, a man drove a car on the pavement on Westminster Bridge, killing four people and injuring 50, before he stabbed a police officer to death near Parliament.

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