UPI.com:

A U.S. spy plane and a missile-tracking ship reportedly conducted surveillance missions over waters between the Korean Peninsula and northeast China, as the United States remains on guard for North Korea provocations.

South Korean military sources told News 1 on Tuesday that the plane, a U.S. RC-135S Cobra Ball, flew over the West Sea, also known as the Yellow Sea, on Feb. 3 ahead of the Lunar New Year.

The Cobra Ball previously has been deployed from Kadena Air Base in Okinawa, Japan. Online flights trackers in September showed the plane flying over the Yellow Sea, close to northern Chinese territory.

The U.S. Navy deployed the USNS Howard O. Lorenzen to the West Sea from Thursday to Sunday. The ship is equipped with X-band and S-band radar systems that can monitor and track regional ballistic missile launches…

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