OMAHA, Neb. (AP) — Police say a woman walking her dog alerted officers to a man she found on the steps of a southeast Omaha house, but he died later at a hospital.

Paramedics sent to the scene around 2:15 a.m. Thursday performed CPR on the man before he was placed in an ambulance.

Police have not released the man’s name or said how he died. A homicide investigation has been launched.