A team is trying to rescue a 52-year-old man injured in a rock fall in a 1,000m-deep (3,280ft) cave in Germany, in an operation that could take days.
The Riesending cave is Germany’s deepest and it took one of the man’s companions up to 12 hours to return to the surface to raise the alarm.
Some 200 people are involved in the operation, near Berchtesgaden in southern Germany.
The first rescuers reached the man in the vertical cave on Monday.
A second group, including an Austrian doctor used to cave rescues, descended some hours later, Bavarian public TV said. Another team from Switzerland was also reported to be on its way.
While one of his companions went to seek help, the other stayed with him. He is said to be from the Stuttgart area although authorities have not released his name.
The entrance was found in 1995, but it is only in the past dozen years that explorers have begun investigating the cave system, which is said to be full of ravines and vertical shafts.