Risto Kettumaki.

Risto Kettumaki. Photo: QPS

Police have located the body of an 81-year-old man who had been missing south-east of Brisbane since Sunday night.

Risto Kettumaki was reported missing from a residential complex on Cleveland-Redland Bay Road in Thornlands about 7pm.

His disappearance triggered a large police, SES and helicopter search in the area on Monday and Tuesday.

Police said his body was located in an area off Cleveland-Redland Bay Road and his death was not suspicious.

Investigators had feared for Mr Kettumaki’s welfare because he had a medical condition.