Story highlights
- Water park: A separate marketing firm put on the "Color Play Asia" party
- Video shows a fireball erupting, followed by people running through flames
- Firefighters believe a flammable powder exploded in midair, according to state news
 (CNN)At
 least 472 people were injured -- about 100 of them seriously -- after 
flammable powder apparently exploded in midair at a recreational water 
park in Taiwan, the East Asian nation's official Central News Agency 
reported. 
The flames erupted 
when the unknown substance blew up over a stage around 8:30 p.m. 
Saturday (8:30 a.m. ET) at Formosa Fun Coast, firefighters said, 
according to the CNA report. 
CNA reported that "the fire was quickly brought under control," but not before hundreds suffered injuries.
Video
 showed a massive fireball suddenly engulfing the stage, followed by 
screaming people running for their lives through flames.
Some people used large, inflated inner tubes as stretchers to carry out the injured, CNA reported. 

Hundreds injured in Taiwan water park blast 00:43
Calling
 it the "worst incident of mass injury (ever) in New Taipei," Taiwan's 
most populous city, Mayor Eric Chu called for ambulance support from 
neighboring Taipei, Taoyuan and Keelung. In addition, Taiwanese defense 
ministry spokesman Luo Shao-he said all military hospitals in northern 
Taiwan were prepared to take patients.
Formosa
 Fun Coast indicated the fiery explosion occurred during a "Color Play 
Asia" party put on by a separate marking company that leased out space 
at the park.
"We are very regretful 
(for) this accident that caused injuries to many victims," Formosa Fun 
Coast said in a statement. "The most urgent matter  currently for us is 
to handle and assist with ... victims on the scene and work 
comprehensively with the New Taipei Fire Department."




