UK Parliament attack: Woman pulled alive from river Thames after 'terror incident' in London

A woman has been pulled from the River Thames alive after Wednesday's attack on a bridge near Britain's parliament in Westminster, the Port of London Authority (PLA) said, adding that she was being treated for serious injuries.

"A female member of the public was pulled from the water near Westminster Bridge, alive, with serious injuries," said a PLA spokesman. "She's undergoing very urgent medical treatment now."

He added that the river had been closed to all non-emergency traffic in the immediate area. 

Two people have died in Wednesday's incident near Britain's parliament, Sky News said on Twitter, citing unspecified sources. Earlier it was reported that a woman had died and other people were being treated for "catastrophic" injuries after the attack in Westminster in London.

A policeman was stabbed, an assailant shot and several other people injured in what police said they were treating as a terrorist incident.

Prime Minister Theresa May was safe after the incident, a spokesman for her office said. He declined to say where May was when the attack took place.