The same unidentified armed foreign ship has fired at four Vietnamese fishing boats over the past two months, local police and border guard forces cited fishermen as saying.
The latest shooting happened last week, claiming one life and wounding one person.
A 38-year-old Vietnamese steersman was shot dead by the crew of an armed foreign ship that opened fire on his fishing boat off the southern province of Kien Giang on Friday, authorities said.
Chao Van Sang, 42, hailing from the southern province of Hau Giang, told police in Kien Giang’s Chau Thanh District on Sunday that Ngo Van Sinh, who was his uncle, died in the attack.
At 3:00 pm that day, Sang, Sinh and many other fishermen was operating on their boat in the waters of unknown coordinates when they were approached by a foreign-flagged speedboat armed with a machine gun.
Five people in camouflaged battledress and another in civil clothes appeared on board the foreign vessel, holding submachine guns in their hands, Sang recounted.
The crew of the foreign ship opened fire when their vessel was about 15 meters away from the local boat.
Sinh still asked everyone to take shelter in a hold while he continued to steer the ship away from the foreign vessel, Sang narrated.
About 15 minutes later, Sang said he climbed up from the basement and saw Sinh die in the cabin, with one of his arms nearly cut off and bullet holes seen on his face and around the fishing boat, after the foreign ship had left the scene.
The same foreign boat later attacked other Vietnamese fishing ships nearby, causing serious injuries to another steersman, Nguyen Hung Cuong, who was shot in his right thighbone, Sang added.
Cuong is being treated at a hospital in Kien Giang.
Sang told police that the same foreign boat fired at the water to threaten another Vietnamese ship, also off Kien Giang, two months ago.
A provincial border guard officer confirmed several cases in which Vietnamese fishermen were fired at by foreign vessels.
Last month, a fisherman died from loss of blood after being shot in the abdomen by the crew of the same foreign ship off Kien Giang, according to the officer.