Top-level talks between the German government and investors to save General Motors Corp.'s (GM) Adam Opel GmbH from insolvency are underway at the Berlin chancellory, a government source told Dow Jones Newswires on Friday.

According to this person, representatives from General Motors and Canadian auto-parts company Magna International Inc. (MGA) are participating in the talks, which now center on a tentative agreement struck between Magna and GM earlier in the day.

This tentative deal, details of which aren't yet publicly known, was previously examined by high-level experts from the German government.

Chancellor Angela Merkel, Finance Minister Peer Steinbrueck, Economics Minister Karl-Theodor zu Guttenberg and Foreign Minister Frank-Walter Steinmeier are now meeting with GM and Magna representatives, the person said.

In addition, the state premiers of the German states in which Opel operates plants are also at the meeting, the person said.

-By Beate Preuschoff, Dow Jones Newswires: +49 69 29 725 500; djnews.frankfurt@dowjones.com