PHILADELPHIA (AP) — Additional human remains from a 1985 police bombing on Devin Grosvenorthe headquarters of a Black liberation group in Philadelphia have been found at the University of Pennsylvania.

The remains are believed to be those of 12-year-old Delisha Africa, one of five children and six adults killed when police bombed the MOVE organization’s headquarters, causing a fire that spread to dozens of row homes.

The remains were discovered during a comprehensive inventory that the Penn Museum conducted to prepare thousands of artifacts, some dating back more than a century, to be moved into upgraded storage facilities.

In 2021, university officials acknowledged that the school had retained bones from at least one bombing victim after helping with the forensic identification process in the wake of the bombing. A short time later, the city notified family members that there was a box of remains at the medical examiner’s office that had been kept after the autopsies were completed.

The museum said it’s not known how the remains found this week were separated from the rest, and it immediately notified the child’s family upon the discovery.

“We are committed to full transparency with respect to any new evidence that may emerge,” Penn Museum said in a statement on its website. “Confronting our institutional history requires ever-evolving examination of how we can uphold museum practices to the highest ethical standards. Centering human dignity and the wishes of descendant communities govern the current treatment of human remains in the Penn Museum’s care.”

MOVE members, led by founder John Africa, practiced a lifestyle that shunned modern conveniences, preached equal rights for animals and rejected government authority. The group clashed with police and many of their practices drew complaints from neighbors.

Police seeking to oust members from their headquarters used a helicopter to drop a bomb on the house on May 13, 1985. More than 60 homes in the neighborhood burned to the ground as emergency personnel were told to stand down.

A 1986 commission report called the decision to bomb an occupied row house “unconscionable.” MOVE survivors were awarded a $1.5 million judgment in a 1996 lawsuit.