German economics minister Karl-Theodor zu Guttenberg Thursday said if an acceptable bid emerges for General Motors Corp.'s (GM) German unit Adam Opel AG, the government could consider a trusteeship for the company.

"And I emphasize the word 'if,'" zu Guttenberg said at a press briefing following a top-level internal meeting on Opel in Berlin, which included Chancellor Angela Merkel.

Zu Guttenberg urged the two potential investors for Opel to submit detailed plans on their bids. Further, zu Guttenberg didn't rule out that there could be other potential investors for Opel.

The two investors which have expressed interest in Opel include Fiat SpA (F.MI) as well as a consortium that involves Canadian auto parts maker Magna.

-By Frankfurt Bureau; Dow Jones Newswires; +49 69 29 725 500; djnews.frankfurt@dowjones.com