Shocked South Yorkshire MPs have described a scene of chaos after a terror attack outside the Palace of Westminster.
Witnesses described seeing a car crash into the perimeter fence on Westminster Bridge, hitting pedestrians, before the driver ran towards police officers guarding parliament.
Onlookers said a man armed with a knife had attacked police officers at the gate before being shot. One police officer has reportedly been stabbed.
It is being reported that two people have died and a number have sustained 'catastrophic injuries'.
Police said they are treating it as a 'terrorist incident until we know otherwise'.
Rotherham MP Sarah Champion tweeted that four shots had been fired outside Portcullis House, the offices of 213 MPs and their staff.
Barnsley East MP Michael Dugher said: "A heartfelt thank you to all those who keep us safe in Parliament.
"Thoughts and prayers with everyone affected by this incident in Westminster."
Rother Valley MP Kevin Barron said: "Huge thanks to the police for their reaction to this incident, I was voting at the time. My staff and I are ok."
Don Valley MP Caroline Flint said: "Safe. Awaiting news. Heart goes out to those who have been attacked. Armed police securing building."
More on this breaking story as we get it.