SEOUL, South Korea — North Korea claimed it has captured an unmanned U.S. submersible and put it on display in Pyongyang near the captured spy ship USS Pueblo, a pro-North Korean newspaper in Japan said Monday, but the U.S. dismissed the report.The ultra-small unmanned submersible vessel was captured during a reconnaissance mission in waters off North Korea's eastern city of Hamhung, said the Choson Sinbo newspaper, which is published by a pro-North Korean association linked to the Pyongyang government. The newspaper report on its Web site, monitored in Seoul, was accompanied by a picture purported to be of the black torpedo-shaped U.S. vessel. There were no further details as to when or how North Korea obtained it.