North Korea may deploy as many as 100,000 troops to aid Russia’s war on Ukraine if the alliance between Pyongyang and Moscow continues to deepen, according to people familiar with assessments made by some Group of 20 nations.

The analysis is one of several on the evolving partnership between Russian President Vladimir Putin and North Korean leader Kim Jong Un, said the people, speaking on condition of anonymity to talk about private discussions. They stressed that such a move wasn’t imminent and that military support at that scale — if it occurred — would likely happen in batches with troops rotating over time rather than in a single deployment.