SAN FRANCISCO, CA – A man was arrested Sunday afternoon in San Francisco’s Tenderloin neighborhood on suspicion of manslaughter, police said.

The 38-year-old suspect beat a man up with his fists in the 700 block of O’Farrell Street at about 1:20 p.m., according to police.

The victim, a 66-year-old man, was taken to a hospital where he passed away. His name was not immediately released by the medical examiner’s office.

The case remains under investigation and police have not released the suspect’s name.