"The Riyadh civil defense put out a fire that broke out at a carpentry workshop in the Badr district of Riyadh," the Saudi civil defense wrote on its official Twitter account, AFP reported.
It said the victims' identities had not yet been determined. No information was given on the cause of the overnight fire.
The civil defense posted photos of what appeared to be an enormous lumber yard engulfed in flames, with firefighters working through the night to douse the blaze.