A supervisory board meeting of Magna International Inc. (MGA) scheduled for Tuesday has been postponed, a person familiar with the matter said Monday.

The supervisory board was to meet to discuss the company's offer for General Motors Corp's (GM) Opel GmbH.

Magna is nevertheless optimistic of signing an agreement with General Motors on taking a stake in its European subsidiary Opel in the coming days, the person said.

Although Magna has signed a Memorandum of Understanding with GM, the agreement is non-binding and not exclusive, and GM has said it remains open to other offers.

Earlier Monday, Belgian investor group RHJ International SA (RHJI.BT) confirmed it is in advanced talks with GM on taking an Opel stake. Until recently RHJ appeared to have dropped out of the race for Opel.

Besides RHJ, Beijing Automotive Industry Holding Co. Ltd. also submitted a detailed proposal for Opel earlier this month, offering EUR660 million for a 51% stake, according to a document seen by Dow Jones Newswires.

Company Web site: http://www.magnasteyr.com

-By Katharina Becker; Dow Jones Newswires; +49 69 29725500; katharina.becker@dowjones.com