An endangered gaur has been found dead in the central province of Nghe An and initial investigation suggested that it was more likely due to natural causes than poaching.
Official statement from the province said several people on Wednesday found its body decomposing at a forest area which has been repurposed for plantation.
Investigation found no signs of human attacks.
Officials said it might have died due to poor heath. The gaur was an adult, but his age has not been determined.
Forest rangers will check the carcass for further investigation.
Local residents said they have seen up to five gaurs in the area.
The species is listed as vulnerable by the International Union for Conservation of Nature due to rapid population decline. It receives strict protection under Vietnamese regulations.
Conservationists estimate there are around 500 wild gaurs in Vietnam, down from more than 3,000 in the 1970s, mostly due to poaching.