Man, 75, becomes fifth victim of Westminster attacker
Prime Minister Theresa May described Wednesday's attack as 'sick and depraved'.
Met Police have described an emergency situation close to the Palace of Westminster as a "firearms incident".
A man with a knife charged through the gates into the front yard of the Palace on Wednesday afternoon, eyewitnesses reported.
The Met tweeted that it received reports of the incident at approximately 2.40pm.