Carmarthen East and Dinefwr MP Jonathan Edwards has been confirmed as one of the Members of Parliament on lockdown in Westminister after what police are treating as a terrorist incident.

A policeman has been stabbed and his attacker shot by officers at the House of Parliament with reports suggesting that as many as five people have been “mowed down” on nearby Westminster Bridge.

MPs have said they had heard three or four gunshots and staff inside Parliament were told to stay inside their office before a meeting was suspended.

Commons Leader David Lidington told MPs the "alleged assailant was shot by armed police".

A Plaid Cymru spokesman said: "Jonathan is in Parliament and they have locked all MPs in the chamber and voting lobbies.

"Staff are all safe in a different building. 

Labour leader Jeremy Corbyn has tweeted the following statement on the ongoing incident in Westminster.

"Reports suggest the ongoing incident in Westminster this afternoon is extremely serious.

"Our thoughts are with the victims of this horrific attack, their families and friends.

"The police and security staff have taken swift action to ensure the safety of the public, MPs and staff, and we are grateful to them."

Leader of the Welsh Conservatives, Andrew RT Davies added: “The horrific reality of these incidents is yet to sink in and our thoughts and prayers are with everyone who has been caught up in this violent attack on our democracy.

“We are reminded on occasions such as these of the bravery of the emergency services, and of those who place their own safety on the line to protect the lives of others.

“Once the horror and anger that we now feel subsides, we will have no choice but to muster the strength we need to continue the fight to rid the world of this evil.”