DUBAI- Qatar's central bank sold 500 million riyals ($136.8 million) of Treasury bills with maturities of three, six and nine months, it said on Thursday.

It sold 300 million riyals of three-month bills at an interest rate of 2.36 percent, 100 million riyals of six-month at an interest rate of 2.43 percent and 100 million riyals of nine-month at an interest rate of 2.72 percent, it said.

($1 = 3.6541 Qatar riyals)

(Reporting by Asma Alsharif; Writing By Tom Arnold Editing by Gareth Jones) ((Tom.Arnold@thomsonreuters.com; +97144536265; Reuters Messaging: tom.arnold.thomsonreuters.com@reuters.net))