Abnormal radiation detected near Korean border

SEOUL, South Korea (AP) — Abnormally high radiation levels were detected near the border between the two Koreas days after North Korea claimed to have mastered a complex technology key to manufacturing a hydrogen bomb, Seoul said Monday. The Science Ministry said its investigation ruled out a nuclear test by North Korea, but failed to determine the source of the radiation. It said there was no evidence of a strong earthquake, which follows an atomic explosion.