Donald Trump on Tuesday urged tough action against the "animals" behind the suspected terror attack in Westminster.

The US president said on Tuesday morning in a tweet: "Another terrorist attack in London...These animals are crazy and must be dealt with through toughness and strength!"

A driver was arrested on suspicion of terrorism offences after a car crashed into security barriers outside the Houses of Parliament at high speed on Tuesday morning.

At least three people were injured when the silver Ford Fiesta hit a group of cyclists and pedestrians waiting for traffic lights to change. Witnesses said the car mounted the pavement on the wrong side of the road at up to 50mph and travelled around 40 metres (130ft) before hitting a bollard.

Armed officers swooped in to arrest the driver, removing him from the vehicle at gunpoint.