Afghan police said Monday they have detained a total of six men in connection with the shooting death last week of a Japanese doctor who was a well-known aid worker in the central Asian country.Tetsu Nakamura, local representative of Japanese aid group Peshawar-kai, and his staff were traveling in two vehicles when he was gunned down in an ambush Wednesday in the eastern province of Nangarhar, according to Afghan authorities and group members.Seven to eight assailants -- with three armed with automatic rifles and other firearms -- were involved in the killing of Nakamura, 73, who was shot a…READ FULL ARTICLE