Three China Coast Guard ships were spotted in Japanese territorial waters around the Senkaku Islands in the East China Sea on Monday morning, the Japan Coast Guard said. 
The intrusion was the first of its kind since July 5. The three vessels entered the waters and left the area about two hours later, according to the 11th Regional Coast Guard Headquarters in Okinawa Prefecture. 
China and Taiwan claim the Japanese-controlled islets, which they call Diaoyu and Tiaoyutai respectively.

Source: QNA