Witnesses described the scene at a Taiwan water park as "hell" after a ball of fire ripped through a crowd, with authorities putting the injured at more than 500 on Sunday, almost 200 of them seriously hurt.
The injury toll in the blast late Saturday, which came as coloured powder being sprayed on the partygoers ignited, more than doubled as officials began to track down victims who had taken themselves to hospital or been ferried there by others.