HOHHOT, March 29 (Xinhua) -- A total of 16 people suspected of causing an explosion in a residential building in northern China's Inner Mongolia Autonomous Region have been detained, local police announced Wednesday.
The accident at about 2 p.m. Saturday in a multi-story residential building in Tumd Right Banner, Baotou city, caused part of the building to collapse.
Five people were killed and another 25 injured in the incident.
Police said the explosion was caused by spontaneous combustion of explosives that had been illegally stored in the building.