Former U.S. President Donald Trump's first wife, Ivana Trump, died at age 73 in an accident involving "blunt force trauma" to the torso, the New York City medical examiner said, NBC News reported.

A high-ranking New York City Mayor's Office official with direct knowledge of the matter said the circumstances of Trump's death are consistent with a fall on the stairs.

The New York City Fire Department said it responded to a call Thursday about a cardiac arrest at Ivana Trump's Manhattan home and found her dead when they arrived on the scene.

Ivana Trump's body was found on the spiral staircase of her apartment, a senior New York official told NBC News.

Following Ivana's death, hearings for Donald Trump and their two children, Donald Trump Jr. and Ivanka Trump, were postponed as part of a civil tax fraud investigation by the New York attorney general's office into the Trump Organization.