BILLINGS, Mont. -- A preliminary autopsy report indicates a Canadian man who went missing after attending a friend's bachelor party in Montana drowned in a creek.

Yellowstone County officials say no foul play was suspected in the death of 37-year-old Cameron Collin of Airdrie, Alberta.

His body was found Saturday in Pryor Creek, south of Billings, not far from where he was last seen.

The medical examiner's office is waiting for toxicology results before issuing a final determination on Collin's cause of death. The tests could take several weeks.

The Billings Gazette reports Collin was in the Billings area for a friend's wedding.

He attended a bachelor party on Oct. 4 but did not join the group when they went into town. He was reported missing when he failed to show up for the wedding.