Authorities are reporting that at least 30 people have been killed in a suicide bombing in Yemen's capital city, Sanaa.

Dozens of others are reported injured following the explosion outside a police college. It's claimed the attack may have been deliberately targeted at students there who were going to enrol in the college.

A local journalist told the BBC that the bomber drove his car into a queue of students who were coming from all over the country for the recruitment drive.

No group has claimed it was behind the blast.