Five people caught illegally trading explosives were taken into custody on Monday in Thuan Nam District of the central coastal province.
Using explosives for fishing is agaisnt the law.
Police seized 500kg of explosives, the largest amount ever traded in the province.
Nguyen Van Tham, 54, Tran Thi Nga, 46, Tran Thi Nu, 35, Tran Thi Ngan, 44, and Nguyen Van Tuyen, 48, were arrested while they were in possession of the explosives.
At the police station, the suspects confessed they were selling these explosives to individuals who used them for offshore fishing.
The district police have completed filing criminal proceedings.
In recent years, using explosives for fishing has become more and more popular and complicated, according to the Fishery Department of Ninh Thuan Province.
Since early this year, the department has uncovered 120 cases in which fishermen used explosives for fishing, which is against the law.
VNS