STOCKHOLM, March 5 (Reuters) - Swedish bourse operator Nasdaq Stockholm said on Tuesday Oscar Properties had received observation status on the Stockholm Stock Exchange.

Oscar Properties is one of several highly indebted Swedish real estate groups buckling under soaring borrowing costs and slower demand. Some of its creditors have in recent months demanded immediate repayment of loans.

The bourse said in a statement it had taken the measure based on the above news, and its rule that an issuer's financial instruments may be given observation status if there is uncertainty in respect of the issuer's financial position.

(Reporting by Anna Ringstrom, editing by Louise Rasmussen)