Reports say North Korea likely conducted a nuclear test

North Korea likely conducted a nuclear test, the Japanese government said on Wednesday, citing seismic data."Judging from the past cases, there is a possibility that there was a nuclear test," Chief Cabinet Spokesman Yoshihide Suga said Wednesday.Japan's Meteorological Agency said Wednesday's jolt is similar to the ones triggered by underground nuclear tests conducted by Pyongyang in the past, according to public broadcaster NHK.South Korea's Yonhap News Agency, as well as Chinese sources, also suggested North Korea could have conducted a nuclear explosion Wednesday morning.