London terror attack - what we know so far

A massive police operation is under way after a terror attack in Westminster, in the heart of London.
By The Newsroom
Published 23rd Mar 2017, 12:00 BST
Updated 24th Mar 2017, 10:09 BST
Police officers conduct a fingertip search on Parliament Square. PIC: PAPolice officers conduct a fingertip search on Parliament Square. PIC: PA
Police officers conduct a fingertip search on Parliament Square. PIC: PA

This is what we know so far:

Related topics:London