BERLIN (AFP)--U.S. investment fund Ripplewood Holdings LLC interested in Opel, the German unit of struggling General Motors Corp. (GM) for which Berlin is trying to find a buyer, a newspaper report said.

The Frankfurter Allgemeine Zeitung daily, in its Wednesday edition, cited "two people close to the matter" for its information but said Ripplewood could't immediately be contacted for comment.

Opel declined to comment on the report, the newspaper added.

Ripplewood Holdings, a New York-based private equity fund, already controls German auto components maker Honsel.

The German government is looking to secure Opel's future by finding a buyer to take it from General Motors which said Monday that it faced the increasing likelihood of having to file for bankruptcy.

Italian automaker Fiat SpA (F.MI), teaming up with already bankrupt Chrysler, has said it is ready to take on GM's European assets, including Opel, which directly employs 26,000 people in Germany.