KyivZelensky claims up to 50,000 North Korean troops are coming.
He says Pyongyang trades soldiers for missile know-how, technology that could later threaten Seoul and Tokyo.
Zelensky did not cite a source for the figure, up from his 30,000 estimate in July, under North Korea’s 2024 pact with Russia.
He is pressing South Korea for air-defence support as talks with Seoul continue.