A police officer has been stabbed in the Houses of Parliament in central London, Commons Leader David Lidington has said.
He told MPs the “alleged assailant was shot by armed police” following a “serious” incident.
Staff inside Parliament were told to stay inside their offices.
The BBC's Laura Kuenssberg said police told her someone had been shot and MPs said they heard “three or four gunshots”.
Please click here for further details & updates.