ATHENS- Greece sold 812.5 million euros ($965.01 million) of three-month treasury bills at a negative yield, the country's debt agency PDMA said on Wednesday.

The debt agency sold the new paper at a yield of -0.40%, unchanged from a previous auction in July.

The amount raised included 187.5 million euros in non-competitive bids.

The sale's bid-to-cover ratio was 1.35, down from 1.85 in the previous auction. Settlement date is on August 6.

($1 = 0.8420 euros)

(Reporting by George Georgiopoulos) ((george.georgiopoulos@thomsonreuters.com; +30210 337 6437; Reuters Messaging: george.georgiopoulos.thomsonreuters.com@reuters.net))