Police were investigating whether he fell down the stairs, two people familiar with the matter told The Associated Press on Thursday. They spoke on condition of anonymity because they could not discuss the matter publicly. The medical examiner’s brief report did not specify when the accident occurred. Donald Trump announced Thursday that Ivana died at her home near Central Park on Manhattan’s Upper East Side. It was 73. Her son Eric Trump said it was “a very sad day, a very sad day” as he left home on Thursday. A Czech-born ski racer and businesswoman, Ivana Trump was born Ivana Zelnickova in 1949. She was married to the former president from 1977 to 1992 and they had three children together: Donald Jr., Ivanka and Eric. The Trumps became a power couple in the 1980s and operated one of his casinos in Atlantic City, as well as helping decorate Trump Tower. Their marriage ended in a messy, public divorce after Donald Trump met his next wife, Marla Maples. But in recent years, Ivana Trump has been on good terms with her ex-husband. He wrote a 2017 book that was talked about once a week. Her death came at a difficult time for the Trump family. Two of her children, Donald Jr. and Ivanka, and the former president were scheduled to appear in the coming days for questioning in the New York attorney general’s political investigation into the family’s business practices. But the attorney general’s office agreed to postpone the depositions — a condition for an out-of-court hearing under oath — because of Ivana Trump’s death. The Morning Update and Afternoon Update newsletters are written by Globe editors, giving you a concise summary of the day’s most important headlines. Sign up today.