A 67-year-old man has drowned overnight after being swept away by the Ringarooma River.
Emergency services attended Main Street, Derby last night about 8 pm after receiving reports of a man being swept away by the river.
Police and SES volunteers searched the area for the man with assistance from the Westpac Rescue Helicopter.
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Sergeant Scott McKinnell said weather conditions in the area hampered search efforts.
"The temperature in Derby was around zero at the time the man went missing, with heavy fog, which made conditions very tough," he said.
"Those conditions caused us to have grave concerns for the man and searching continued into the night."
The man was located deceased 400 m down stream from where he was last seen about 1:30 am this morning.
A report is being prepared for the coroner.