A Romanian woman who plunged into the Thames during a terror attack on Westminster Bridge was holidaying in the capital with her fiancé.

The Romanian Embassy in London confirmed that Andreea Cristea, 29, remained in a critical condition in hospital on Thursday afternoon following the attack.

Ms Cristea, who is said to be an architect, was pulled from the Thames after jumping or falling from the bridge. She was given urgent treatment at the scene and rushed to hospital.

It is not clear whether she leapt into the water in an attempt to escape or if she was thrown from the bridge after being struck by the 4x4.

Footage showed the terrifying moment the speeding 4x4 mounts the pavement on the bridge before Ms Cristea plunges into the water.

Ms Cristea was in the capital celebrating her fiancé’s birthday, according to reports. He also sustained injuries in the attack on Wednesday afternoon.

The Romanian Embassy told BuzzFeed News that she underwent surgery last night, which was described as "successful". Her condition was being monitored.

The Embassy said her fiancé suffered a knee injury but has been discharged from hospital and that they are in contact with both their families, BuzzFeed reported.

Tributes for Westminster & Parliament Attack 20 show all Tributes for Westminster & Parliament Attack 1/20 A police officer places flowers and a photo of Pc Keith Palmer on Whitehall near the Houses of Parliament in London Dominic Lipinski/PA 2/20 A floral tribute to the victims of yesterday's terror attack is left at the security cordon near Westminster Abbey in central London Daniel Leal-Olivas/AFP/Getty Images 3/20 Metropolitan Police in a minute's silence at New Scotland Yard Sky News 4/20 A minute's silence is observed outside New Scotland Yard in London to pay respect to the victims of yesterday's terror attack in Westminster Jonathan Brady/PA 5/20 MP's in a minute's silence at the House of Commons BBC 6/20 Conservative MP James Cleverly pays an emotional tribute to his friend Pc Keith Palmer, telling the Commons he was a "strong, professional public servant". PA 7/20 The flag above the Houses of Parliament in London flies at half mast the day after a terrorist attack Jeremy Selwyn 8/20 People leave flowers at the scene after an attack on Westminster Bridge in London Hannah McKay/Reuters 9/20 Flowers outside the Queen Elizabeth II Centre in London Gareth Fuller/PA 10/20 Flowers at the Police Memorial after yesterday's terror attack on the Houses of Parliament in Westminste Alex Lentati 11/20 Cressida Dick in a minute silence today at New Scotland Yard for Westminster terror victims Jeremy Selwyn 12/20 A bunch of roses is layed at the Metropolitan Police headquarters at New Scotland Yard in central London Justin Tallis/AFP/Getty Images 13/20 Flowers arrive in Westminster the day after the attack Jeremy Selwyn 14/20 The Union Flag on Portcullis House flies at half mast following yesterday's attack Carl Court/Getty Images 15/20 Flowers are laid at the scene after an attack on Westminster Bridge in London Hannah McKay/Reuters 16/20 Terror attack: Flowers placed below a police cordon on Westminster Bridge Hannah McKay/Reuters 17/20 Prime Minister Theresa May makes a statement in Downing Street, London Richard Pohle/The Times/PA 18/20 Flowers are laid at the scene after an attack on Westminster Bridge in London Hannah McKay/Reuters 19/20 Two policemen stand guard at a cordoned off area on the way to the Houses of Parliament in central London Matt Dunham/AP 20/20 The royal standard at full mast above Buckingham Palace in London the day after a terrorist attack Jonathan Brady/PA 1/20 A police officer places flowers and a photo of Pc Keith Palmer on Whitehall near the Houses of Parliament in London Dominic Lipinski/PA 2/20 A floral tribute to the victims of yesterday's terror attack is left at the security cordon near Westminster Abbey in central London Daniel Leal-Olivas/AFP/Getty Images 3/20 Metropolitan Police in a minute's silence at New Scotland Yard Sky News 4/20 A minute's silence is observed outside New Scotland Yard in London to pay respect to the victims of yesterday's terror attack in Westminster Jonathan Brady/PA 5/20 MP's in a minute's silence at the House of Commons BBC 6/20 Conservative MP James Cleverly pays an emotional tribute to his friend Pc Keith Palmer, telling the Commons he was a "strong, professional public servant". PA 7/20 The flag above the Houses of Parliament in London flies at half mast the day after a terrorist attack Jeremy Selwyn 8/20 People leave flowers at the scene after an attack on Westminster Bridge in London Hannah McKay/Reuters 9/20 Flowers outside the Queen Elizabeth II Centre in London Gareth Fuller/PA 10/20 Flowers at the Police Memorial after yesterday's terror attack on the Houses of Parliament in Westminste Alex Lentati 11/20 Cressida Dick in a minute silence today at New Scotland Yard for Westminster terror victims Jeremy Selwyn 12/20 A bunch of roses is layed at the Metropolitan Police headquarters at New Scotland Yard in central London Justin Tallis/AFP/Getty Images 13/20 Flowers arrive in Westminster the day after the attack Jeremy Selwyn 14/20 The Union Flag on Portcullis House flies at half mast following yesterday's attack Carl Court/Getty Images 15/20 Flowers are laid at the scene after an attack on Westminster Bridge in London Hannah McKay/Reuters 16/20 Terror attack: Flowers placed below a police cordon on Westminster Bridge Hannah McKay/Reuters 17/20 Prime Minister Theresa May makes a statement in Downing Street, London Richard Pohle/The Times/PA 18/20 Flowers are laid at the scene after an attack on Westminster Bridge in London Hannah McKay/Reuters 19/20 Two policemen stand guard at a cordoned off area on the way to the Houses of Parliament in central London Matt Dunham/AP 20/20 The royal standard at full mast above Buckingham Palace in London the day after a terrorist attack Jonathan Brady/PA

A spokesman for the Port of London Authority, which looks after safety on the River Thames, said last night: “A female member of the public was recovered from the water near Westminster Bridge.

“She is alive but undergoing urgent medical treatment on a nearby pier. We believe she fell from the bridge.”

Four people were killed in the attack in Westminster, including the attacker and police officer Keith Palmer.

Spanish teacher Aysha Fade, who has two young children, was also among those killed, as well as US tourist Kurt Cochran.

The attacker ploughed a car into a crowd of pedestrians on the bridge before abandoning the vehicle and running towards Parliament armed with a knife.

He fatally stabbed PC Palmer to death before he was shot dead by armed police.