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Yonhap reported a military analysis showed the debris appeared to form the lower part of a liquid fuel-based old type SRBM, citing an unnamed military source.

He added that some, such as the KN-25 SRBM, are “definitely designed for production in higher numbers.”

There also appears to be evidence that Russia has used the OTR-21 Tochka SRBM, which was believed to have been retired, he said.