The man who carried out a deadly attack near Britain's Parliament was known to police and intelligence services, and had previously been investigated, Prime Minister Theresa May says. Speaking in the House of Commons Thursday, May said the man was British-born.
"Some years ago, he was once investigated by MI5 in relation to concerns about violent extremism. He was a peripheral figure; the case was historic; he was not part of the current intelligence picture," May said of the attacker. She added that investigations continue.