A worker was killed and four others were seriously injured Tuesday morning in an explosion on a tanker under construction in Hiroshima Prefecture.

The explosion aboard the 499-ton chemical tanker Enshu Maru, moored in a harbor on Nomi Island, killed Batilarran Anthony Bulan, a 28-year-old man from the Philippines working as a trainee for shipbuilding company Nakatani Zosen, local police said.

The four injured are Shingo Asano, 42, Morizo Kimoto, 53, Hiroki Okimoto, 18 -- all residents of Hiroshima Prefecture -- and another trainee from the Philippines, Rolly Panio Lagusae, 21.