From the window of the parliamentary Press Gallery, I have just seen police shoot a man who charged at officers while carrying what appeared to be a knife. A large crowd was seen fleeing from the man before he entered the parliamentary estate.
After several officers evaded him he was swiftly shot by armed police.
Ministers have been evacuated and journalists ordered to remain at their desks.
More follows. Read Julia Rampen’s news story here.
Armed police at the cordon outside Parliament on Wednesday afternoon. Photo: Getty