All those arrested in connection with the Westminster terror attack which left five people dead have now been released with no further action being taken.
"All those arrested in connection with the terrorist attack in Westminster on Wednesday, 22 March have now been released with no further action", the Metropolitan Police said in a statement.
A 30-year-old man, who was detained in Birmingham on March 26 on suspicion of preparation of terrorist attacks, was released today, the Met Police said.
Masood was shot dead at the gates of the Palace of Westminster, bringing an end to 82 seconds of carnage on March 22.
Masood drove his rented SUV into pedestrians on Westminster Bridge on March 22 before crashing his vehicle into railings and then running into the grounds of Parliament.
Flowers are seen placed outside of the Houses of Parliament in remembrance of victims eight days after a man drove his auto into pedestrians on Westminster Bridge then stabbed a police officer in London, Britain, March 30.
The Metropolitan Police's enquiries continue.
A coroner's officer told the inquest that a post mortem on Masood was held on March 23 and the "provisional cause of death given at the time was a gunshot wound to the chest".
Adjourning the inquest to May 19, senior coroner Dr Wilcox said: "I take a moment to pass my sympathies to the family of Masood, who are also all victims of this incident". He was then shot dead by police.