TAMWORTH, Ont. - Ontario's police watchdog is investigating the death of a 59-year-old man in connection with a string of violent incidents near Napanee that left two men dead and a man and woman in hospital.

The Special Investigations Unit says the man who died Wednesday was a suspect in the incidents earlier that day in Tamworth, a small community north of Napanee in eastern Ontario.

Few details have been released about what happened Wednesday but provincial police have said there are six crime scenes involved.

The SIU says on Wednesday evening, an OPP officer found a vehicle about 15 kilometres north of Tamworth on Highway 15 that was apparently connected to a man wanted by police.

The agency says the officer got out of his cruiser and was approaching the vehicle when a gunshot was heard, and that a man was found dead in the bushes a short distance away.

The SIU has assigned four investigators and two forensic investigators to probe the circumstances of the incident and anyone with information is asked to contact the agency.