Federal prosecutors on Tuesday sued to seize two New York City apartments worth $14 million that were allegedly bought with proceeds from a corrupt scheme involving Mongolia’s huge copper mine, a former prime minister of that nation, and his Harvard Business School graduate son.

The lawsuit filed in U.S. District Court in Brooklyn details a total of $128 million in allegedly unlawful contracts granted by a Mongolian state-owned mining company to shell companies, which benefited then Prime…