Two people have been shot outside the Houses of Parliament.
The building has been put on lockdown, with the House of Commons suspended and MPs ordered to stay in the chamber or in their offices.
A police officer is reportedly down and CPR is being performed, after three or four shots were fired within the gates of New Palace Yard.
Reports from inside the House of Commons suggest a second man is being held on the ground with a knife to his throat
Armed police were seen running towards the exit of the Parliamentary estate.
An air ambulance has since been seen landing in Parliament Square.
An eyewitness in the Mirror’s Parliamentary office said at least three shots were fired in New Palace Yard – just inside the security cordon of Parliament.
The whole estate was put on lockdown.A group of school children had come through security and were 10 feet away and were ushered into nearby Westminster Hall.
Our witness saw around 30 police officers in New Palace Yard in the moments after the incident, many armed with heavy duty guns.
* More to follow