In the months before the attack on Westminster, Khalid Masood had been living in Birmingham. Here's what we know about him so far.
West Midlands Teenager Bailed Over Terror Offences
A West Midlands teenager arrested on suspicion of Syria-related terrorism offences has been released on police bail.
The 18-year-old, from Stourbridge, near Birmingham, was arrested yesterday at an address in Lye by West Midlands Counter Terrorism officers in a pre-planned operation.
Officers later seized computer equipment from his home address for forensic examination.
A West Midlands Police spokesman said: "The action was pre-planned and intelligence-led and police are keen to stress there was no immediate threat to public safety.
"The man - arrested on suspicion of preparing for terrorist acts, contrary to Section 5 of the Terrorism Act 2006 - has been bailed until a date in July when he will return for further questioning.''
The man has surrendered his passport and must abide by an overnight curfew while on bail.
Two men from Birmingham remain in custody after a search for accomplices to the Westminster terror attack has seen 11 arrested this week.
A total of seven people have now been arrested after raids in Birmingham over the terror attack in Westminster.
Jess Phillips MP has written to pupils at Holy Family Catholic Primary school, who were in Westminster yesterday.
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