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 found clothes and a walking stick with Ms Cameron's name on it on Thursday at the end of Four Mile Beach and fear she may have been taken by a crocodile.
"We have also located some biological matter which we believe to be human remains and these are being bested 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."