DUBAI - Qatar's central bank said on Thursday it had sold 1.15 billion riyals ($315 million) of Treasury bills in a monthly auction, with yields rising from last month's sale.

The bank sold 550 million riyals of three-month bills at a yield of 2.30 percent, 450 million riyals of six-month at 2.49 percent, and 150 million riyals of nine-month at 2.62 percent.

In early November, it sold 1.4 billion riyals of T-bills: 550 million riyals of three-month at 2.26 percent, 750 million riyals of six-month at 2.45 percent and 100 million riyals of nine-month at 2.52 percent.

(Reporting by Andrew Torchia) ((andrew.torchia@thomsonreuters.com; +9715 6681 7277; Reuters Messaging: andrew.torchia.thomsonreuters.com@reuters.net))