An initial autopsy conducted on RFK’s granddaughter Saoirse Kennedy Hill revealed that her body showed “no trauma inconsistent with lifesaving measures,” authorities said Friday.

Hill’s cause of death — possibly from an overdose — is pending a toxicology report, District Attorney Michael O’Keefe’s office said in a statement.

The autopsy was conducted by the state medical examiner’s office, and her death remains under investigation by Barnstable police and Massachusetts State Police detectives, the Boston Globe reported.

The Boston College student, 22, was staying at the sprawling Hyannis Port home of her grandmother, 91-year-old Ethel Kennedy, RFK’s widow, when Barnstable police received a call Thursday about an “overdose” at the property.

By the time medics arrived at the Marchant Avenue mansion at about 2:30 p.m., the young woman was already in cardiac arrest, the Hyannis News reported. She was rushed to Cape Cod Hospital, where she was pronounced dead.

Hill’s family confirmed her death in a statement Thursday night but did not offer a cause.

“Our hearts are shattered by the loss of our beloved Saoirse,” the statement read.

Hill was the daughter of Courtney Kennedy Hill, the fifth of Robert and Ethel Kennedy’s 11 children.

The college student spoke publicly about her struggles with depression and was a champion for the #MeToo movement as part of her studies.

Hill was studying mass media and communications, according to her LinkedIn page, and was expected to graduate next year.

