A senior citizen was seriously injured on Monday night as he crossed Nesconset Highway near the Smith Haven Mall.

According to the Suffolk County Police Department, Medford resident Harold Edelman, 70, was walking south across the busy highway, near Hallock Road, at 11:15 p.m. He was struck by a 2012 Nissan Cube that had been going east on Nesconset Highway.

Edelman had serious head injuries and was listed in critical condition at Stony Brook University Hospital, police said. The Cube’s driver, 38-year-old Oakland Gardens resident Julie Chung, was not hurt.

Police impounded the car for a safety check and detectives are investigating the crash.

Anyone with information may contact the detectives at 631-854-8452. All calls will be kept confidential.