The man police believe to be responsible for the terrorist attack in Westminster on Wednesday, 22 March, has now been formally identified as Khalid Masood.
According to a statement from the Metropolitan Police, Masood, aged 52, was born Adrian Russell Ajao in Dartford, Kent and detectives believe he was most recently living in the West Midlands. Masood was also known by a number of aliases.
Today, the police released this image of Masood in an appeal for more information from the public. They also reminded people that Masood went by a number of aliases, such as Adrian Elms and Adrian Russell Ajao.
The Prime Minister told the House of Commons yesterday that the attacker was British-born and "known to MI5".
"Masood was not the subject of any current investigations and there was no prior intelligence about his intent to mount a terrorist attack," the police said.
"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.
"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."
Four people died in the attack, after a car was driven along the pavement on Westminster Bridge and a policeman was stabbed outside the Houses of Parliament. Masood was shot dead at the scene.
Islamic State has claimed responsibility for the attack. The terrorist group said Masood was a 'soldier of the Islamic State', via its news agency Amaq.
Anyone with any information about Masood can call the Anti-Terrorist Hotline on 0800 789 321.