Japan Coast Guard officials say two Chinese government ships have entered Japan's territorial waters off the Senkaku Islands in the East China Sea.
They say the ships entered the waters off Minamikojima island around 3:50 p.m. on Saturday, Japan time. They say the ships apparently attempted to approach a Japanese fishing boat operating in the area.
As of 6 p.m., the two boats remained in Japan's territorial waters, about five kilometers and nine kilometers east of the island.
The Coast Guard has sent patrol ships to warn off the vessels immediately and to ensure the safety of the Japanese fishing boat.
This is the 10th time this year that the Coast Guard spotted Chinese government ships entering Japan's territorial waters off the Senkaku Islands.
Japan controls the islands and the Japanese government maintains they are an inherent part of the nation's territory. China and Taiwan claim them.