A man who allegedly stabbed a ranger at a national park in the central province of Ninh Thuan turned himself in to police on Friday, local media reported.
Nguyen Hau, 30, confessed to the killing of Le Dinh Tue, 34, at Nui Chua National Park on Thursday.
Hau said he, his wife and several local residents entered a mangrove forest in the park to dig up the roots and find sea worms, which they would sell for money.
Tue and other rangers tried to stop the residents, saying such an act is prohibited in the protected area. The two sides argued and then the group of residents left.
While Tue was walking back home, Hau followed him and stabbed him in his chest and arms with a fork. The man fled the scene.
The ranger died on his way to hospital.
Local police said Hau usually entered the forest to catch sea worms.