The Bundaberg RACQ CareFlight Rescue helicopter resumed the search at first light this morning for a man missing in the Kalpowar area west of Bundaberg.
Sixty-five year old Christopher Prentice was last seen at an address in Pine Street Kalpowar Saturday.
Police say he has not made contact with family or friends, and they hold concerns for his welfare as his behaviour is out of the ordinary.
Bundaberg RACQ CareFlight Rescue, as part of the co-ordinated ground and air police search, did a sweep of waterways in the region this morning and two searches yesterday.
Mister Prentice is described as being caucasian in appearance, around 170 centimetres talls with a slim build and brown shoulder length hair and a brown beard.