Police arrested a man on suspicion of terrorism offences on Tuesday saying he appeared to deliberately drive into cyclists before ramming a car into security barriers outside the British parliament in what appeared to be the second attack on the building in just under 18 months.
The man, in his 20s, injured three people as he drove through a group of cyclists and pedestrians before hitting a barrier outside parliament during the early morning rush hour.
"Given that this appears to be a deliberate act, the method, and this being an iconic site, we are treating it as a terrorist incident," London Assistant Commissioner Neil Basu said.
Basu said the man was not co-operating with police. He was not believed to be known to security forces, he said. None of the injuries were life-threatening, officials said.
Police said a silver Ford Fiesta collided with a number of cyclists and pedestrians before crashing into barriers outside the Houses of Parliament at 7:37 a.m. local time (2:37 a.m. ET).
"The driver of the car, a man in his late 20s, was arrested at the scene by armed officers," police said in a statement. "He was arrested on suspicion of terrorist offences. There was nobody else in the vehicle, which remains at the scene and is being searched. No weapons have been recovered at this stage."