Rescuers in central Vietnam are trying to reach 12 men trapped underground after a section of a tunnel collapsed, the BBC eports.
The men were working on the Da Dang-Da Chomo hydropower plant in the hilly Lam Dong province when the tunnel caved in early on Tuesday after heavy rain.
Authorities have drilled into the rock to pump oxygen to the trapped men, and are clearing rubble.
Vietnam is constructing dozens of plants around the country to boost its energy production.
