Nine people were killed when a truck transporting wood overturned on Wednesday in a mountainous district in central Vietnam, an official said.
The men were travelling in the vehicle when it flipped over, crushing them under its load.
Six other people were being treated for injuries, including the driver, said Nghe An provincial official Vi Duc Hoai.
"Police are investigating. We think that heavy rains which made the road slippery might have contributed to the accident," Hoai told AFP.