North Korea on Thursday said for the first time that it successfully tested a new multiple-warhead missile capability, state-run media said, a claim dismissed by the South Korean military as a “deception.”

Pyongyang “successfully conducted the separation and guidance control test of individual mobile warheads” on Wednesday, the official Korean Central News Agency reported, adding that “the separated mobile warheads were guided correctly” to three target coordinates.

The effectiveness of a decoy that separated from the missile was also verified by anti-air radar, it added.