Police have identified Khalid Masood as the man who carried out the Westminster attack, as the death toll rose to five, the BBC reports.
Masood, 52, was born as Adrian Elms in Kent and was shot dead by police. He had not been the subject of any current police investigations.
PC Keith Palmer, 48, Aysha Frade and US tourist Kurt Cochran, 54, were killed on Wednesday, while a 75-year-old man died on Thursday evening.
The so-called Islamic State group has said it was behind the attack.
Three women and five men were arrested in London and Birmingham on suspicion of preparation of terrorist acts following Wednesday’s attack.