Police investigating the Westminster attack say they've made two more 'significant' arrests overnight.
Nine people are now in custody.
Scotland Yard have revealed the terrorist, Khalid Masood, was born Adrian Russell Ajao.
The fourth person he killed has been named as 75-year-old Leslie Rhodes from Streatham in south London.
Crowds attending a vigil for the victims have been told the "evil and twisted acts of terrorism will be defeated".
These people say they had to be in Trafalgar Square last night:
The fourth person he killed has been named as 75-year-old Leslie Rhodes from Streatham in south London.
Scotland Yard's acting deputy commissioner, Mark Rowley, has given an update.
