US ambassador to South Korea Mark Lippert has been injured by an attacker in Seoul, officials say.

The attack happened as Mr Lippert, 42, was about to attend a breakfast meeting in the capital.

Pictures later emerged showing the envoy bleeding from his face and left hand. He was cut by a razor blade.

Mr Lippert was taken to hospital. The attacker - believed to be a 55-year-old man - was subdued by security officers and arrested.

Mr Lippert's injuries were not life-threatening, the US State Department said.