All the people arrested in connection with the terror attack in Westminster have been released without charge.
Just over a week after terrorist Khalid Masood killed four people in the atrocity, the Met announced that 12 suspects arrested in connection with attack will go free.
Police said on Saturday that a 30-year-old man arrested in Birmingham on suspicion of preparation of terrorist acts has been released.
Meanwhile eleven other people who were previously arrested in connection with this investigation have all been released with no further action.
Police officer Keith Palmer, Spanish teacher and mother-of-two Aysha Fade, US tourist Kurt Cochran and 75-year-old retired window cleaner Leslie Rhodes all died in attack on March 23.
The full extent of their injuries were set out at the opening of an inquest at Westminster Coroner's Court on Wednesday by senior coroner Dr Fiona Wilcox.
Masood was shot dead at the scene, while more than 35 people injured.
An inquest into the death of Masood has also been opened and adjourned under the authority of Dr Fiona Wilcox.
Pre-inquest reviews for both cases are expected to be heard at the Royal Courts of Justice on May 19.