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Three people were hurt, none critically.

Police arrested the 29-year-old driver, a resident of England’s Midlands region who was not previously known to counterterrorism police or the intelligence services. Basu said the suspect was not co-operating with police.

Photo by EWALINA OCHAB/AFP/Getty Images

“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,” Assistant Commissioner Neil Basu of the Metropolitan Police told reporters outside Scotland Yard.

Police flooded the area after the incident was reported at 7:37 a.m., cordoning off streets surrounding the heart of Britain’s government. The nearby Westminster subway station was closed, and police asked people to stay away from the area, which is filled with government offices and major tourist attractions including Westminster Abbey.

Most of the cordons were lifted by mid-afternoon, apart from a stretch of road right outside Parliament, where forensics officers in blue coveralls collected evidence from the crashed Ford Fiesta.

Photo by Jack Taylor/Getty Images

The suspect was not co-operating with police, and officers were working to confirm his identity, said Basu, who oversees U.K. counterterrorism policing. No other suspects have been identified and police believe there is no further threat to Londoners, he said.

Basu said “we don’t believe this individual was known” to police or Britain’s intelligence services.

Eyewitnesses said the silver car was travelling at high speed when it hit pedestrians and cyclists, then crashed into a barrier designed to protect Parliament from vehicle attack. Two people were taken to local hospitals and another was treated at the scene. One woman remained hospitalized Tuesday afternoon, but her injuries aren’t believed to be life threatening, authorities said.