Four people were killed and another was injured when an illegal gold mine collapsed in the central province of Quang Nam on Tuesday.
The tragedy occurred at around 5 p.m. when they were working underground in the mountainous district of Nam Giang when the mine suddenly collapsed.
Several others who attempted to rescue the victims were hospitalized after inhaling toxic gases.
They only reported the deadly accident to local authorities two hours later.
“Maybe it is an illegal mine and they were afraid to report to authorities,” Cho Rum Nhien, a local official, said.
Rescuers had to pump oxygen into the mine for several hours before they could get in.
At around 11 p.m. they rescued an injured worker and found the bodies of four others.
The police are investigating.