About the Author
Colin Zwirko
Colin Zwirko is a Senior Analytic Correspondent for NK News based in Seoul. Follow him on Twitter @ColinZwirko.
This is a developing story. Please check back for updates. (Last updated on Feb. 24 at 11:55 a.m. KST with reaction from South Korea's defense ministry.)
North Korea launched four “Hwasal-2 strategic cruise missiles” on Thursday from the country’s east coast as part of “fatal nuclear counterattack” drills on “the hostile forces,” according to state media.