A US submarine and Japanese ship have collided in the Arabian Sea, Kyodo News agency reported Tuesday, citing an unidentified government official. The submarine struck a commercial vessel, Kyodo said, adding that the official was quoting information from the US side. There was no immediate word about injuries. The information was passed to Japan's Foreign Ministry shortly after 4 a.m. Tuesday (1900 Monday), Kyodo said. Officials at Japan's Defense Ministry and Ministry of Foreign Affairs were not immediately able to confirm the report. The US Fifth Fleet, based in Bahrain, also had no immediate comment.