Metropolitan Police Asst Commissioner Mark Rowley said officers believed there to be one suspect but said they were continuing to carry out checks.
Irishwoman injured Among the injured was an Irishwoman who was being treated in hospital for "non-life-threatening injuries". From professional cartoonists to talented amateurs, people took to social media to share their work and not just protest against the act of terrorism, but also called for unity and peace.
Another neighbour, Iwona Romek, a cake factory worker from Poland who has lived in Birmingham since 2005, told the Telegraph that the man - who she said looked in his late 40s - had lived at No. 4 Quayside, in the Winston Green district, for around seven months, before leaving suddenly about two months ago. Detectives have searched 21 properties in London, Brighton, Wales, Manchester and the central English city of Birmingham in one of Britain's biggest counterterrorism operations in years.
One woman has died and a police officer was stabbed. "The case is historic".
Mr Rowley said there would be an "enhanced" armed and unarmed presence in London over the next few days.
"Whilst there is no evidence of further threats you will understand our determination to find out if he either acted totally alone inspired by terrorist propaganda or if others have encouraged, supported or directed him".
Witness reports suggested the assailant and the stabbed policeman were the people seen lying on the ground just outside the parliamentary building.
Three years later, after leaving jail, Masood was accused of stabbing a man in the nose, leaving him needing cosmetic surgery.
But he was not under investigation when he sped across Westminster Bridge on Wednesday, plowing down pedestrians with a hired auto before running into the parliamentary grounds and fatally stabbing an unarmed policeman.
Another view of the address under police guard.
After a string of raids and arrests in the wake of the attack, two more arrests were made last night, Rowley said. Law enforcement is swarming the area, and the House of Commons has been suspended.
Police have increased the number of officers on the streets, both armed and unarmed, in the wake of the attack.
The neighbour said her experience of him was of a "nice man".
Candles burn on Westminster Bridge the day after an attack in London, March 23, 2017.
Paramedics fought to save Palmer's life, and that of his attacker, on the floor of the cobbled courtyard in front of Parliament, with Foreign Office minister Tobias Ellwood among those who rushed to help.
Aysha Frade was killed as she walked across Westminster Bridge.
The photographer who captured an image of a woman wearing a hijab walking past a victim of yesterday's London terrorist attack has defended her actions, saying she looked distressed and horrified.