The Westminster terror attacker has been named as Khalid Masood.

Scotland Yard said the 52-year-old 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.

Masood was born in Kent and detectives believe he was most recently living in the West Midlands.

He was also known by a number of aliases, the Metropolitan Police said.

Masood's 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 Met said.

Three people were killed when the knife-wielding attacker ploughed a car through pedestrians on Westminster Bridge, before storming the Parliamentary estate. He was shot dead.

Earlier on Thursday Prime Minister Theresa May disclosed that the terrorist was British-born and known to police and MI5.

He was once investigated in relation to concerns about violent extremism some years ago but was a "peripheral figure". The case is "historic" and the attacker was "not part of the current intelligence picture," Mrs May added.