Ontario's special investigations unit is looking into the death of a man at a Cornwall mall Wednesday night.

Cornwall police told the SIU they were called to the Cornwall Square Shopping Centre around 7 p.m. where a 64-year-old man was behaving suspiciously.

Shortly after they got there, they said the man fell from the third floor of the mall's parking structure.

He was later pronounced dead in hospital.

The SIU probes incidents involving police where there has been a death, serious injury or allegation of sexual assault.

Anyone who witnessed this incident can call 416-622-2038 or 1-800-787-8529 extension 2038.