The Kehlsteinhaus, known as the Eagle’s Nest and formerly Adolf Hitler’s mountain retreat, is seen after a large fire broke out at the site near Berchtesgaden in Bavaria, southern Germany. (AFP pic)BERLIN: Firefighters battled on Saturday to put out flames that tore through Adolf Hitler's "Eagle's Nest" mountain retreat while police detained a suspect who investigators said may have psychiatric problems.

The alarm was raised late on Friday at the former guest house for top Nazi officials, 1,834m high in the Bavarian Alps.

As snow fell on the Alpine peak, the Eagle's Nest was still engulfed in flames at dawn on Saturday and fire chief Michael Brandl told a press conference the last elements of the inferno were being put out during the afternoon.