Two more "significant arrests" have been made in connection with the Westminster attacks in London.
Scotland Yard's top anti-terror officer Mark Rowley says the suspects were held overnight in the West Midlands and north west as he revealed that the killer's birth name was Adrian Russell Ajao.
Mr Rowley appealed to the public for information about the killer, who was also known as Adrian Elms but was using the name Khalid Masood at the time of the attack.
The officer also revealed that the fourth member of the public injured in the attack, who died in hospital last night, was 75-year-old Leslie Rhodes from Streatham, south London.
Mr Rowley said two people remain in hospital in a critical condition, one with a life-threatening injuries. Two police officers injured in the attack are also in hospital with "significant injuries".