Two seamen were executed Monday on charges of killing their captain and three other crewmen in a mutiny aboard a Taiwanese trawler last year, prison officials reported. Hsu Guohsin, 29, from the Chinese province of Fujian, and Taiwanese Yu Tien-shou, 36, were executed after the Supreme Court upheld the death penalty imposed by the Taipei District court last year, the officials said. The men were shot in the back. The seamen were convicted of killing crewmen of the trawler Tung Chung in June last year while it was fishing near Indonesian waters. The two said they mutinied because the captain abused them and gave them too much work to do.