Thirteen people died when a fire broke out at a karaoke bar in Vietnam.

The fire broke out at the eight-storey building in the country's capital, Hanoi, and quickly spread to several nearby restaurants and venues.

It took firefighters about five hours to put out the blaze.

Vietnamese premier Nguyen Xuan Phuc asked local authorities to search for victims and ordered police to carry out a prompt investigation.

The cause of the fire was not immediately known.