A Vietnamese fisherman on board a Taiwanese fishing boat was wounded after the boat was hit by a supersonic anti-ship missile on Friday.
"We can confirm that a Vietnamese was injured in the accident this morning," Nguyen Xuan Tao, head of the Vietnamese Workers Management in Taiwan, said.
The missile was launched accidentally by a Taiwanese navy patrol boat and hit the trawler in waters off the Phenhu Islands in the Taiwan Strait, according to authorities.
The skipper on the trawler was killed and three other crew on board, including a Vietnamese and a Filipino, were wounded.
The Vietnamese fisherman was identified as Bui Trong Van, who had arrived in Taiwan last month for work, Tao said.
He said Van was taken to hospital but his injuries were not serious.
The Hsiung Feng III missile was fired during a drill at around 8:10 am (0010 GMT) from a 500-ton missile ship docked at a naval base in the southern city of Tsoying and flew in the direction of China, local media reported.
It went through the trawler, but did not explode, nor did it sink the fishing vessel.
A preliminary investigation showed that missile operators likely failed to follow proper procedures, the official Central News Agency said.
Taiwan is a major market for Vietnamese labor export, with an estimated 170,000 people working there, official statistics showed.