Kampala Metropolitan Police spokesman Patrick Onyango says that preliminary investigations show that the explosion was caused by excessive heating of the steambath boiler. It is equally suspected that the control valve in the boiler could have been faulty.
The gas escaped from the sealed metallic container causing a mechanical explosion, which damaged buildings within the vicinity. The victims were evacuated and the scene of crime cordoned off,” said Onyango.
The manager of Marco's - only identified as Mercy says there were no customers in the sauna at the time of the explosion. She says that the victims were employees of the spa, who were all taken to different clinics with minor injuries.
Paul Tumusiime, a security guard at one of the neighbouring buildings says there was intensive shaking which lasted for some minutes before the actual explosion.
"It was like an earthquake and afterwards it exploded like a bomb. In the next few minutes people hurried to get out of all the neighbouring buildings,” Tumusiime said.
Tumusiime added that those who were in the affected building also ran for their lives as many were shouting causing a scene, which paralyzed transport on the already jammed road. In 2011, a similar incident happened at a health club in Ntinda when a cylinder exploded leaving eight people with serious injuries.