Police have made an appeal to the public for information about the Westminster attacker Khalid Masood.
The Metropolitan Police said Masood, who was born in Dartford, Kent as Adrian Russell Ajao, had used a number of aliases in recent years and was known to police.
He is believed to have been living in the West Midlands, and had previously spent time in Luton, Crawley, West Sussex, Rye and Eastbourne. He spent the night before the attack at Preston Park Hotel in Brighton.
Since the attack, police have made nine “significant” arrests, raided 16 properties, and seized 2,700 items.
Met police acting deputy commissioner Mark Rowley said:
“Our investigation focuses on [Masood’s] motivation, his preparation and his associates.
“While there’s still no evidence of further threats, you’ll understand our determination is to whether he acted totally alone inspired by terrorist propaganda or if others have encouraged supported or directed him.”
On Wednesday, Masood injured 50 pedestrians with his car on Westminster Bridge, before crashing into the railings outside the Palace of Westminster and stabbing PC Keith Palmer to death with a knife. He was then shot dead by armed police.
As many as 31 people required hospital treatment after the attack, including two people still in critical condition and one with life-threatening injuries. The three civilian fatalities have been named by police as Aysha Frade, Kurt Cochran, and Leslie Rhodes.
Two police officers also remain in hospital with “very significant” injuries.
The Islamic State have claimed that Masood was one of their “soldiers”, but it remains unclear whether he had any personal contact with the group.