A supplied image obtained on Thursday, October 12, 2017 of Anne Cameron, 79 (AAP Image/Queensland Police Media)
Forensic testing is being conducted on "biological matter" found near clothing and a walking stick after a dementia sufferer went missing from a far north Queensland nursing home.
Anne Cameron, 79, was last seen near the OzCare Aged Care facility at Craiglie, Port Douglas, on Tuesday afternoon.
Police fear Ms Cameron, who only been at the facility for a few weeks, may have been taken by a crocodile after becoming disoriented when she wandered into a dense area of bushland.
Clothes and a walking stick with Ms Cameron's name on it were discovered on Thursday at the end of Four Mile Beach.
"We have also located some biological matter which we believe to be human remains and these are being tested in Cairns," Acting Inspector Ed Lukin said on Thursday.
"We continue to search the area in the hope of finding her alive (but) because of the proximity of these items near the creek bank, we cannot rule out the possibility of a crocodile attack.
"Family have been notified and have asked for their privacy."
Officers from the state Department of Environment and Heritage Protection have been searching for any crocodiles in the area.
The results of the forensic tests are likely to be ready on Friday.
© AAP 2017