London terrorist Khalid Masood acted alone, there is no information suggesting that further attacks have been planned, London Metropolitan Police said.
Khalid Masood was active on the encryption messaging service WhatsApp two minutes before he started his attack Wednesday on Westminster Bridge, but no evidence has emerged he was communicating with ISIS at any point, the official told CNN.
A police officer places flowers and a photo of Pc Keith Palmer on Whitehall near the Houses of Parliament in London, after seven people were arrested in raids in London, Birmingham and elsewhere linked to the Westminster terror attack.
A British-born former teacher and Muslim convert, Masood had shown up on the periphery of previous terrorism investigations that brought him to the attention of Britain's MI5 spy agency.
Armed officers made two further "significant" arrests overnight in Birmingham and Manchester as part of a nationwide investigation, code-named Operation Classific, being led by the Met Police SO15 counter-terrorism command into the attack.
Police said the rampage that left four people dead in London was "terrorism-related", and people who knew Masood in recent years described him as religious.
"We are determined to understand if Masood was a lone actor inspired by terrorist propaganda or if others have encouraged, supported or directed him".
Who gets to ask questions at the White House briefing?
But, of course, she had already left the Obama administration a year earlier, so it's kind of hard to pin that on her. Schiff, the ranking Democrat on the House Intelligence Committee, declined to reveal any details of the information.
At birth, he was registered in Kent as Adrian Elms, but later took his stepfather's name becoming Adrian Ajao in childhood.
The chances of figuring out Masood's are now slim, according to Basu. Two people are now in a critical condition - one with life-threatening injuries.
"He had a young child, who I'd think was about 5 or 6 years old".
Detailed police analysis reveals that Masood's attack started last Wednesday at (GMT) 14:40:08 on the Westminster Bridge, when he drove his marauding auto on the pavement full of people, killing three people and leaving many injured, some critically.
A 30 year-old man has been arrested in connection with last week's terrorist attack in Westminster.
The police also named the 75-year-old victim killed in the deadly attack as Leslie Rhodes from south London. Most people arrested have been released, while details of Masood's life and his time before he drove to London on the day have been traced.
Police have been searching an address in Birmingham's Winson Green area where Masood is thought to have been living. The last conviction was in 2003. The six were also held on suspicion of preparation of terrorist acts.
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