One suspect is in custody after an elderly man was found dead following an argument with his neighbor in Whittier on Saturday.

Deputies received a call around 6:34 p.m. about a dispute between two neighbors in a Whittier community, according to the Los Angeles County Sheriff’s Department.

When deputies arrived, the 74-year-old victim was found suffering from head trauma, and he was unconscious and no longer breathing. CPR and lifesaving measures were administered, but the elderly man was pronounced dead at the scene.

The man’s son discovered his father after hearing “a disturbance on the porch” following the argument, authorities added.

Neither the suspect’s nor the victim’s identities have been released at this time, though the neighbor involved in the altercation, a man in his 20s, was interviewed by investigators.