North Korean leader Kim Jong Un again toured major munitions factories and has ordered a drastic increase in production of missiles and other weapons, state media said Monday, as the South Korean and U.S. militaries announced they will begin major drills next week to hone their joint capability against the North’s evolving nuclear threats.

Kim’s push to produce more weapons also comes as U.S. officials believe Russia’s defense minister recently talked with North Korea about selling more weapons to Russia for its war with Ukraine.

The Korean Central News Agency said Kim visited factories producing tactical missiles, mobile launch platforms, armored vehicles and artillery shells on Friday and Saturday.

During a stop at the missile factory, Kim set a goal to “drastically boost” production capacity so the facility can mass produce missiles to meet the needs of front-line military units, KCNA said.