The Japanese Coast Guard says Chinese patrol ships have for the first time entered Japan's territorial waters off northern Kyushu in western Japan.
Coast Guard officials say a Chinese patrol ship entered waters southwest of Tsushima island in Nagasaki Prefecture at around 11:50 AM Saturday. It left about 30 minutes later after being warned by the Japanese Coast Guard.
But officials say the ship and another Chinese patrol vessel were later spotted in Japanese waters north of Okinoshima island in Fukuoka Prefecture at around 3:50 PM.
Officials say the Japanese Coast Guard issued warnings and kept the vessels under watch. They say both left the territorial waters after about an hour.