German Economy Minister Karl-Theodor zu Guttenberg said Friday that all options are still open for General Motors Corp.'s (GM) German Opel brand, including a possible insolvency.

"All options are still under consideration," zu Guttenberg told Dow Jones Newswires at the sidelines of an event in Berlin.

Separately, zu Guttenberg described Magna International Inc.'s (MGA) bid for Opel as "interesting," but added that some financial details still require clarification as the German state is expected to support the deal with taxpayer's money.

Company Web site: www.opel.com

-By Andrea Thomas and Christoph Rauwald, Dow Jones Newswires; +49 69 29 725 512; christoph.rauwald@dowjones.com