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U.S. think tank Center for Strategic and International Studies (CSIS) released the report "Undeclared North Korea: The Sangam-ni Missile Operating Base" on Feb. 15 (local time). Screenshot from CSIS Benyond Parallel website

By Jung Da-min

North Korea has about 20 missile operating bases that would not appear to be on the agenda for denuclearization negotiations with the U.S. at the second summit next week, a prominent U.S. think tank said in its latest report on North Korea's missile bases.

The report, titled "Undeclared North Korea: The Sangnam-ni Missile Operating Base," released by the Center for Strategic and International Studies (CSIS) on Feb. 15 (local time), reveals its new findings on the Sangnam-ni missile base located within North Korea's strategic missile belt in Hochon County, South Hamgyong Province.

"As of 2018, the base is active and being well-maintained by North Korean standards," the report says. It presents the March 1999 establishment and subsequent development process of the missile base 250 kilometers north of the demilitarized zone.

According to the report, Sangnam-ni is an operational missile base housing a battalion or regiment-sized unit equipped with Hwasong-10 (Musudan) intermediate-range ballistic missile (IRBM) with a range of more than 3,000 kilometers.