5 killed, about 40 injured in central London terror attack

British police confirmed that deal toll in Wednesday's terror attack outside the Parliament in central London has risen to five.

Metro Police Assistant Commissioner Mark Rowley told reporters that about 40 people were injured in the attack.

Rowley, also London's top anti-terror officer, said that the officer who died in the attack has been named as Keith Palmer, who was 48 and had 15 years service as a police officer.

He said he would not comment on the identity of the attacker, although he suggested the police was aware of who the assailant was.

The attacker was shot dead after stabbing Palmer. The other three victims were all civilians, the police officer said.