The victim of an attempted murder Friday morning and the alleged assailant were both residents of a senior living facility located in Downtown Berkeley.

After receiving a call about a disturbance at 12:49 a.m., Berkeley police officers arrested a man at Stuart Pratt Manor on suspicion of attempted murder and took him to Berkeley City Jail.

A second man was transported to a nearby hospital with life-threatening injuries. As of Friday afternoon, the victim was still alive and in the hospital, according to Chris Hess, the director of resident services for Satellite Affordable Housing Associates, which manages the senior facility.

Police have not yet released the name of either man found at the scene, although only one man booked to Berkeley Jail in the last 24 hours, 69-year-old Lawrence Landis, was being held on suspicion of attempted murder.

According to a resident at the senior facility who knew both men personally, the suspect was formerly homeless and hadn’t been there very long. She believed that he was mentally ill and said he could sometimes be “very angry.”

The victim, with whom she spent time in art classes at the facility, was a Harvard University graduate and a “treasure” at Stuart Pratt Manor, she said. The assault, which she said left his face bloody, was not something she expected to happen at the senior facility.

Hess said the senior facility will keep a security presence on site throughout the Labor Day weekend and provide counseling to residents who need it.

Katy Abbott covers crime and courts. Contact her at kabbott@dailycal.org and follow her on Twitter @katyeabbott.