Ivana Trump, a skier-turned-businesswoman who formed half of a publicity power couple in the 1980s as the first wife of former President Donald Trump and mother of his oldest children, has died in New York City, her family announced Thursday. She was 73.

The former president posted on his social media app that she died at her Manhattan home.

“She was a wonderful, beautiful, and amazing woman, who led a great and inspirational life,” he wrote on Truth Social. The couple shared three children, Donald Jr., Ivanka and Eric.

“She was so proud of them, as we were all so proud of her,” he wrote. “Rest In Peace, Ivana!”

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Two people familiar with the matter told The Associated Press that police are investigating whether Ivana Trump fell down the stairs and believe her death was accidental.

She was found unconscious near a staircase in the home, the people said. The people could not discuss the matter publicly and spoke to the AP on condition of anonymity. The medical examiner’s office will determine an official cause of death.

“It’s been a very sad day, a very sad day,” Eric Trump said as he left his mother’s home near Central Park.

In a statement, he and his siblings called her “an incredible woman — a force in business, a world-class athlete, a radiant beauty and caring mother and friend.”