CHICAGO (CBS) — A 75-year-old man who was struck by a train Sunday afternoon in west suburban Berkeley committed suicide, an autopsy Monday revealed.

Officers responded at 12:28 p.m. to a call of a person struck by a train in the Union Pacific rail yard at 301 W. Lake St., according to Berkeley Police Sgt. Thomas Duffy.

READ MORE: Chicago Weather: Steamy Heat Through Midweek

Richard C. Lai, 75, was pronounced dead at the scene, according to the Cook County medical examiner’s office. He lived in the 400 block of East Butterfield Road in Elmhurst.

READ MORE: 31 Percent Of Illinois Nursing Homes Are Not Providing CDC With COVID-19 Vaccine Information, Organization Says

An autopsy Monday determined Lai died of multiple injuries and his death was ruled a suicide, according to the medical examiner’s office.

MORE NEWS: Family Of National Guardsman Chrys Carvajal Posts Flyers Around Belmont-Cragin, Offers Reward After He Was Shot And Killed

(Source: Sun-Times Media Wire © Chicago Sun-Times 2016. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed.)