Gunmen have shot and killed a local employee of the US embassy in the Yemeni capital Sanaa, it has been confirmed by the US State Department.

Qassem Aqlan, a security officer, was going to work when he was attacked by masked men on a motorbike.

He had worked at the embassy for at least 10 years and was responsible for co-ordinating security information between the embassy and Yemeni authorities.

He was involved in an investigation into an attack on the embassy last month.

During protests against an anti-Islam film made in the US, demonstrators briefly stormed the embassy grounds and burnt the US flag.

They were driven back by security forces.