In a policy reversal, Russia has begun releasing previously secret documents that could help the heirs of Austrian Jews recover art works stolen by Germany during the Nazi era.

The documents relate to several hundred pieces which Nazi officials seized from Jewish families.

The pieces were either sent to Germany or given to Austrian museums.

The Russian move follows an international conference organised by the United States in Washington this week.

It drew up an agreement on guidelines to identify and publicise stolen works so the original owners can claim them.