A fifth person has died in the Westminster terror attack, with Metropolitan Police confirming the death of a 75-year-old man in hospital
The terrorist has been named as Khalid Masood, 52, but who were his victims?
On Friday morning (NZ time), police confirmed the man had been receiving medical treatment in hospital following the attack, but life support was turned off.
Next of kin had been told.
Dozens were injured when he rammed his car into pedestrians on Westminster Bridge, and two killed. His third victim was an unarmed police officer who bravely tried to stop him entering the UK parliament.
Twenty-nine are still in hospital, four in critical condition. They have been visited by Prime Minister Theresa May.
Keith Palmer, 48, was a member of the Metropolitan Police's diplomatic protection command. He'd been a policeman for 15 years, following a career in the Royal Artillery.
"He was someone who left for work today expecting to return home at the end of his shift, and he had every right to expect that would happen," Acting Deputy Commissioner Mark Rowley said on Thursday.
Mr Palmer apprehended Masood just inside parliament's gates, but was unarmed - while his attacker had two large knives.
"He was a husband and a father, killed doing a job he loved," said Ms May.
"He was every inch a hero, and his actions will never be forgotten."
In 2007, he saved a woman who'd been hurt in a car accident.
A crowdfunding campaign for his family has, in a day, raised more than £215,000.
"He will be remembered as a wonderful dad and husband. A loving son, brother and uncle. A long-time supporter of Charlton FC," his family said in a statement. "He will be deeply missed. We love him so much."
Aysha Frade, 43, was an administrator at DLD College London, close to the bridge.
At the time of the attack, she had just left work and was on her way to pick up her children, aged eight and 11, from school.
"She was a lovely lady. I just can't believe what I'm hearing this morning," neighbour Patricia Scotland told The Telegraph.
DLD College principal Rachel Borland said Ms Frade was "highly regarded" and the staff would miss her deeply.
Kurt Cochran, 54, was an American tourist on holiday to celebrate his 25th wedding anniversary.
He was from Utah, where he owned a popular recording studio and indulged in his passion for music - especially classic rock like Black Sabbath, Aerosmith and Judas Priest.
"With a heavy heart I must pass the sad news of our beautiful brother, father, husband, son and friend Kurt Cochran," his sister Shantelle Payne wrote on Facebook.
"He could not overcome the injuries he received in the London terror attacks. This pain is so heart wrenching and raw it has rocked our family and all that knew him to its core."
His wife Melissa sustained a broken leg and rib when Masood drove into them. She is expected to recover.
The couple had already visited Germany, Scotland and Ireland, and were due to head home the day after the tragic incident.
The identity of the fourth victim, a 75-year-old man, is not yet known.