A doctor has said the rescue of a severely injured man, trapped in Germany's deepest cave, "won't be easy."
Doctor Christoph Specht told news channel NTV: "The conditions are extremely narrow.
"There are only a few people in Germany who know how to handle such a rescue."
The cave on the border of Austria, has only been explored by researchers since 2002, is more than 19km long and up to 1.15km deep.
The 52-year-old cave explorer, named by local media as Johann Westhauser, is trapped in the cave at a depth of 1,000 metres.
More top news
So today is Towel Day. It's been trending on Twitter, has its own Facebook page and website, and even Tim Peake has got in on the action.
An Australian man who kidnapped, drugged and raped a German backpacker has been jailed for nine years.
A New York man has been charged with murder after he was allegedly spotted wheeling the body of his dead wife down a street in a trolley.