When first daughter Ivanka Trump and her husband, Jared Kushner, moved into their luxury $5.5 million six-bedroom Washington, D.C., home in January, they had no clue that their landlord was at the epicenter of a huge fight with the U.S. government, according to Thursday reports. President Donald Trump’s daughter and son-in-law, who is one of his White House advisors, rented the home from a Chilean billionaire who is reportedly suing the U.S. over a mining project in Minnesota that could be worth billions of dollars.

Andrónico Luksic, a mining, banking and industrial mogul in Chile, who Forbes estimated is worth about $4.2 billion, filed a lawsuit against the U.S. government after the Obama administration prevented a Luksic-company plan to develop a copper-and-nickel mine near an area of protected wilderness in Minnesota. The Obama administration blocked Luksic’s request to start mining the area due to environmental concerns.

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A relative and spokesman for Luksic, Rodrigo Terré, who manages the family’s personal investments, told Wall Street Journal Wednesday the family was unaware exactly who the new tenants were. A Luksic-owned real estate company, Tracy DC Real Estate Inc., purchased the 8,200-square-foot house as an investment following the election in November. Terré also said the couple pays “absolute market value” in rent for the house, which is in the Kalorama neighborhood near the U.S. capitol.

A White House spokesperson also confirmed to Wall Street Journal Ivanka Trump and Kushner was paying “fair market value” in rent and said the couple has never met or spoken to their landlord. Ivanka Trump and Kushner were also reportedly unaware of Luksic’s interest in mining U.S. land before renting the house.

Although Terré said it was a pure coincidence the first daughter and her family were renting the home, the Chilean billionaire’s company and several Minnesota politicians have asked Trump’s administration to reverse the decision since Donald Trump took office in January.

Before moving to Washington, Ivanka Trump and Kushner lived in a $10.2 million four-bedroom penthouse at Trump Park Avenue in Manhattan, New York.