Police have arrested two Japanese activists who oppose construction of the Futenma replacement base in Okinawa Prefecture after they were detained by the U.S. military for allegedly trespassing at the gate of Camp Schwab.

One of the pair is Hiroji Yamashiro, who heads a local activist group, the Okinawa Heiwa Undo Center.

Camp Schwab is adjacent to where the construction of the new air base is under way in the Henoko area of the city of Nago.