BERLIN (AFP)--German Finance Minister Peer Steinbrueck said Monday the retail group Arcandor AG (ARO.XE), which owns the Karstadt chain of department stores and a majority share of travel company Thomas Cook Group PLC (TCG.LN), could go bust.

"A bankruptcy is not totally excluded," Steinbrueck told ARD television, adding: "Shareholders must assume their responsibilities" with respect to the group's long-running problems.

Arcandor, which owns 52% of the travel group Thomas Cook, has said it could file for insolvency on Monday unless it obtains EUR437 million in credit from the government.

The company wants to tap a government fund set up to help companies hit by Germany's worst postwar slump.

The group is also negotiating a possible merger however with German rival Metro AG (MEO.XE), the biggest German retailer and owner of the Kaufhof chain, though the talks have run into obstacles.

Arcandor employs 50,000 staff but its call for state aid has left many observers cold because its was already facing problems before the global economic crisis hit Europe's biggest economy in mid-2008.

The government, which recently backed a plan to save automaker Opel (GMQM) the German unit of General Motors Corp (GM), said that was an exceptional operation and that Arcandor must take responsibility for poor management.

The European Commission has also expressed hostility towards state aid for the German retailer.

German media reports said Sunday that Arcandor has stopped paying rent on its department stores - owned by a group of investors led by U.S. bank Goldman Sachs - on June 1.

Around EUR600 million worth of loans to the retailer come up for refinancing Friday.