German tourists Wilfred and Gisela Thor 'probably died on first day of walk at Trephina Gorge'.

By Xavier La Canna.

Two elderly German tourists who died at Trephina Gorge, east of Alice Springs, were not well suited to be at the remote location and probably perished on their first day of their walk, police say.

Both Wilfred Thor, 76, and his wife Gisela Thor, 73, had wandered off the track at Trephina Gorge, which is located 76 kilometres by road from Alice Springs, Police Duty Superintendent Rob Burgoyne said.

A search began on Sunday, with the body of Mr Thor found on Monday and his wife’s body located yesterday.

But police now think they may have died two days earlier — which was their first day on the Gorge.

“The state of the bodies would indicate that they probably died on their first day,” said Duty Superintendent Rob Burgoyne.

The couple started their walk on Friday, but it wasn’t until Saturday afternoon that a ranger realised they were missing, a police spokewoman said. Police were then alerted.

“They had medication in their room which would indicate that they probably weren’t the best people to be wandering around in that sort of heat, in that sort of terrain,” Duty Superintendent Burgoyne said.

“They probably have taken too many chances, but the woman at least was closer to the car park, so she may have been heading on her way back.”

A photograph, not yet released by police, of Ms Thor was found in her camera showing her in good spirits at the Gorge with a 600 millilitre bottle of water, but not wearing a hat.

This post originally appeared on ABC News.