TOKYO: A man who allegedly shot dead a construction worker and wounded three at their office in Japan is on the run, police said on Monday, marking a rare incident of gun violence in the country. Public broadcaster NHK reported that the man, who is yet to be identified, was an acquaintance of the victims and is believed to still be armed. He opened fire inside the office of a construction company in the western city of Wakayama, a police spokeswoman said, adding that 45-year-old Junsuke Ishiyama died after being sent to a hospital for a bullet wound to his stomach. The three wounded were also sent to hospital, the spokeswoman added, one of them unconscious. “We’re still investigating” who and where he is, she said, without giving further details. Local media said police were yet to find a motive for the shooting.