A blast in a suspected dynamite storage depot in the basement of a residential building in Yemen killed up to 19 people as they slept on Tuesday, and reduced their building to rubble, an official said.

"We think it was dynamite," a local official in the southern city of Taiz where the blast took place told Reuters. Al Jazeera had earlier reported the blast took place in a fireworks warehouse.

The official said the pre-dawn explosion caused the collapse of a three-storey building with six residential apartments, and partly destroyed two adjacent homes. At least nine bodies were pulled from the rubble and rescue workers were looking for 10 more believed buried.

Some 15 people also were injured in the blast but survived.

The official said the dynamite was believed to have belonged to a Yemeni businessman and contractor who used explosives in road building works to flatten hills, but who did not live in the building.

An investigation into the cause of the blast was continuing, but based on initial findings there was no indication it was anything other than an accident, the official said. – Reuters