An unarmed police officer who was among five people killed in a suspected terror attack in Westminster has been named as Pc Keith Palmer.

The 48-year-old husband and father was stabbed by a man armed with two large knives inside the grounds of the Houses of Parliament.

Speaking outside Scotland Yard, acting deputy commissioner Mark Rowley, the Met's top anti-terror officer, said: "Today in Westminster we saw tragic events unfold and our thoughts are with those who lost loved ones, those who were injured and all those affected by this attack.

"One of those who died today was a police officer, Pc Keith Palmer, a member of our parliamentary and diplomatic protection command. Keith, aged 48, had 15 years' service and was a husband and father.

"He was someone who left for work today expecting to return home at the end of his shift, and he had every right to expect that would happen.

Tributes have poured in for Mr Palmer.

James Cleverly, MP for Braintree said he was "a brave man".