Cook said it was nerve-wracking to watch police descend on the area but what stood out the most was watching the usually bustling streets and river empty.
The police chief said its counter terrorism command investigation – Operation Classific – continues, involving hundreds of officers from across the counter terrorism network.
Five people, including three civilians, were killed as the attacker ploughed a vehicle through teeming tourists on the Westminster Bridge and then tried to enter Parliament, when he was shot dead, but not before repeatedly stabbing a police officer to death.
Police said Masood was known by a number of names.
“Our determination is to find out if he acted totally alone, inspired by terrorist propaganda, or if others encouraged or supported him”, he said. She is reassured by their vigilance and said, although there is a feeling of a larger threat risk right now, it can’t stop people from experiencing and enjoying life in London.
They added that Masood, who recently converted to Islam, was born in the county of Kent in southeast England and was most recently living in the West Midlands region of central England.
The British flag over parliament flew at half-mast in a sign of mourning while forensic officers in white suits carried out a fingertip search of the courtyard outside where 48-year-old policeman Keith Palmer was stabbed to death.
Islamic State has claimed responsibility for the attack which killed three people and ended when an officer shot dead the attacker.
“His first conviction was in November 1983 for criminal damage and his last conviction was in December 2003 for possession of a knife”.
On Friday, Rowley, the assistant commissioner, reiterated comments from Prime Minister Theresa May, saying that authorities had viewed Masood as a “peripheral figure” and that he had not been part of the general intelligence picture. Shown a photo of him, Iwona Romek said “that is 100 percent” the man who lived next door to her for about five months.
Injured people are assisted after the Wednesday attack.
“We have rigorous procedures in place to ensure we provide a safe environment for those visiting and working on the estate”.
The Metropolitan Police gave Londoners more information this morning on the ongoing investigation into the attacks at Westminster earlier this week.
“He had a wife, a young Asian woman, and a small child who went to school”.
On Wednesday night seven people were arrested on suspicion of the preparation of terrorist acts – including three women and four men ages between 21 and 39-years-old.
According to The Guardian, the attacker was born on Christmas Day 1964.
Two officers remain in hospital with “very significant” injuries, one of whom has been identified as PC Kristofer Aves.
“We are not afraid and our resolve will never waver in the face of terrorism”, May said.