By Catherine Hickley

June 25 (Bloomberg) — Governments have failed to live up to commitments to track down and return looted art to Nazi victims and their heirs, claimants’ representatives said before an international meeting on Holocaust-era assets.

The June 26-30 conference in Prague, attended by delegates from some 50 countries, will review how far nations put into action a non-binding 1998 agreement, known as the Washington principles. Delegates also aim to agree a new declaration on stolen art. Groups representing Jewish victims of theft and their heirs say there are still thousands of looted objects languishing in museums.

“Much too little has been achieved,” Georg Heuberger, the Jewish Claims Conference’s representative in Germany, said by telephone from Frankfurt. “Each country has done its own thing, and only one-third of the countries has made any effort. We find that very unsatisfactory.”