Image copyright EPA Image caption Firefighters put out the fire at an eight-storey karaoke parlour in five hours

A fire at a karaoke lounge in Vietnam has left 13 people dead, according to state media.

The blaze broke out at an eight-storey karaoke bar in the Cau Giay district of Hanoi on Tuesday afternoon.

It took fire-fighters five hours to put it out. Two police officers were injured during the operation.

A guard told reporters that the fire was started by a sign board, and that staff tried to contain the flames but failed.

The fire spread to three neighbouring buildings, burning a car and motorbikes on the street, online news outlet VnExpress reported.

Vietnam's Prime Minister Nguyen Xuan Phuc has ordered police to investigate the cause of the fire and punish anyone who broke the law.

He also told local authorities to carry out fire safety inspections at karaoke lounges and restaurants.