Jeffrey Epstein's autopsy determined the convicted pedophile suffered multiple broken neck bones, according to a report.
One of Epstein's breaks was to the hyoid bone, an injury that experts told the Washington Post is more common in homicide victims.
The discoveries were disclosed to the paper by two people familiar with the findings of the autopsy, which was completed on Sunday, but warranted more information by the Medical Examiner's Office before they make a final cause of death ruling.
"Today, a medical examiner performed the autopsy of Jeffrey Epstein," said Chief Medical Examiner Dr. Barbara Sampson in a statement Sunday night.
"The ME's determination is pending further information at this time. At the request of those representing the decedent, and with the awareness of the federal prosecutor, I allowed a private pathologist (Dr. Michael Baden) to observe the autopsy examination. This is routine practice."
Sampson's office didn't answer a request for comment from the Washington Post about the injuries.
Epstein was found dead of an apparent suicide in his cell at the Manhattan Correctional Center early Saturday. He was being held there without bail since his July arrest on sex trafficking charges.
The Washington Post spoke to Jonathan Arden, president of the National Association of Medical Examiners, who said a broken hyoid bone -- which is near the Adam's apple -- is more common in strangulation murders than suicidal hangings.
"If, hypothetically, the hyoid bone is broken, that would generally raise questions about strangulation, but it is not definitive and does not exclude suicidal hanging," said Arden, who is not involved with the Epstein autopsy.
Numerous studies were also cited by the paper that found hyoid bone breaks were found in the minority of suicidal hangings. One such study conducted from 2010 to 2013 that looked at suicidal hangings in India found that hyoid damage was present in just 16 of 264 cases.