MISSISSAUGA, Ont. - Ontario's Special Investigations Unit says it is probing the circumstances surrounding a man's death this morning in West Lincoln, Ont.

The SIU says at about 2 a.m., Niagara Region police officers arrived at an address (on Michael St.) and located a man in the rear yard of the residence.

While one of the officers was talking with the man, he suffered a gunshot wound and died at the scene.

The SIU has not said why police were called to the residence, nor release the man's name or age.

Five SIU investigators and two forensic investigators have been assigned to investigate this incident.

The provincial agency investigates all reports involving police where there is death, serious injury or allegations of sexual assault.