Kim Jong Un has called for a rapid expansion of North Korea’s nuclear arsenal, condemning US-South Korea military exercises as hostile and war-provoking, Reuters reported.

The Ulchi Freedom Shield drills, which began this week, are described by Washington and Seoul as defensive, but Pyongyang sees them as invasion rehearsals. Kim said the involvement of a “nuclear element” highlights the need for stronger deterrence.

Experts estimate North Korea has material for up to 90 warheads, though around 50 are believed operational. Pyongyang also plans to add a third Choe Hyon-class destroyer by 2026 and is testing new cruise and anti-air missiles, according to Reuters.