Three Northern Territory men are missing in a remote crocodile-infested area of Arnhem Land.
The group was spotted early on Wednesday morning getting out of a car at Dreaming Lady Crossing about 500km east of Darwin.
They have not been seen since and NT police have fears for their safety.
Two of the men are 21 and one is 40.
A search is under way using aircraft and motorbikes, with police being helped by local rangers.
Two men travelling with the missing men were found by local paramedics and family members halfway between the communities of Gunbalanya and Maningrida.
Arnhem Land is a vast wilderness area in the northeast corner of the NT.
Permits are required for non-residents to travel into the area.