A woman holds up a sign at a vigil for the victims of Wednesday's attack, at Trafalgar Square in London, Thursday, March 23, 2017. The Islamic State group has claimed responsibility for an attack by a... (Associated Press) 
 
 LONDON (AP) — Khalid Masood, who attacked Britain's Parliament, killing four people and wounding some 50, was born Adrian Russell Ajao, London's top counterterror officer said Friday. 
 
 Mark Rowley revealed the name in a briefing outside Scotland Yard in which he also announced two more "significant" arrests had been made. That brings the total number of people in custody for the Wednesday attack to nine. 
 
 "We remain keen to hear from anyone who knew Khalid Masood well, understands who his associates were and can provide us with information about places he has recently visited," Rowley said. "There might be people out there who did have concerns about Masood but did not feel comfortable for whatever reason in passing those concerns to us." 
 
 The 52-year-old attacker was born in southeastern England and had most recently been living in the central city of Birmingham. 
 
 Masood drove his car into crowds of people on Westminster Bridge on Wednesday afternoon, killing three and wounding some 50, before stabbing a police officer to death at the Houses of Parliament. He was shot dead by police. 
 
 Rowley said two police officers targeted in the attack have significant injuries. Two other people also remain in critical condition, one with life-threatening injuries. 
 
 The latest victim, who died in the hospital on Thursday, was 75-year-old Leslie Rhodes from Streatham, south London. ||||| An attacker who ran over several pedestrians on London’s Westminster Bridge before stabbing a police officer in the Houses of Parliament, killing three people and leaving 29 more injured in hospital before being killed by police, has been named by police as 52-year-old British-born Khalid Masood. 
 
 "Masood, aged 52 (25.12.1964), was born in Kent and detectives believe he was most recently living in the West Midlands. Masood was also known by a number of aliases," read a statement from London Metropolitan Police. 
 
 "Masood was not the subject of any current investigations and there was no prior intelligence about his intent to mount a terrorist attack. However, he was known to police and has a range of previous convictions for assaults, including GBH, possession of offensive weapons and public order offences. 
 
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 "His first conviction was in November 1983 for criminal damage and his last conviction was in December 2003 for possession of a knife. He has not been convicted for any terrorism offences." 
 
 The naming of the attacker followed the arrest of eight people in connection with the incident after police raided six addresses. 
 
 Earlier in the day, the Amaq News agency, which is often used by the Islamic State group to broadcast propaganda, said ISIS had claimed responsibility for the attack: "A soldier for the Islamic State carried out the operation in answer to calls to target the people of coalition states." 
 
 There was no confirmation that ISIS had directed the attack and British authorities didn't note any connection between Masood and the jihadist group. However, the incident was similar in nature to a series of attacks conducted in Europe using vehicles in recent months, notably in Nice and Berlin. 
 
 The attacker drove a car through pedestrians on Westminster Bridge, killing two people, before crashing into the railings outside the Houses of Parliament. He emerged from the vehicle and attempted to make his way into Parliament. Armed with a knife, he stabbed and killed unarmed police officer Keith Palmer before he was shot by armed police. 
 
 The attacker later died from his injuries. The two victims in addition to the police officer were named as London teacher Aysha Frade and American tourist Kurt Cochran. 
 
 Speaking Thursday morning, British Prime Minister Theresa May did not name the attacker but said that he was known to authorities. 
 
 “The man was British-born and some years ago was once investigated by MI5 in relation to concerns of violent extremism," she said in Parliament. "He was a peripheral figure. His case was historic. He was not part of the current intelligence picture.” 
 
 May called the attack "an act of terrorism aimed at trying "to silence our democracy."
– Khalid Masood, the man responsible for the attack outside Britain's Parliament that killed four people and wounded 50, was born Adrian Russell Ajao, London's top counterterror officer said Friday. Mark Rowley revealed the name in a briefing outside Scotland Yard in which he also announced two more "significant" arrests had been made. That brings the total number of people in custody for the Wednesday attack to nine. "We remain keen to hear from anyone who knew Khalid Masood well, understands who his associates were, and can provide us with information about places he has recently visited," Rowley said, per the AP. Masood, 52, was born in southeast England and had most recently been living in Birmingham. ISIS issued a statement Thursday claiming responsibility for the attack and calling Masood a "soldier." Police say he had criminal convictions going back decades, the Guardian reports. "His first conviction was in November 1983 for criminal damage and his last conviction was in December 2003 for possession of a knife," police said in a statement. Rowley said two police officers targeted in the attack have significant injuries. Two other people also remain in critical condition. The latest victim, who died in the hospital on Thursday, was 75-year-old Leslie Rhodes from Streatham, south London. Police have also identified an injured woman who was pulled from the Thames after Masood drove into crowds on Westminster Bridge.