DUBAI, Oct 20 (Reuters) - Qatar's central bank sold 1.5 billion riyals ($412 million) of government bonds this week in its third domestic bond sale this year, the central bank said on Thursday.

It sold 500 million riyals of three-year bonds at 2.25 percent, 400 million riyals of five-year debt at 2.75 percent, 300 million riyals of seven-year debt at 3.25 percent, and 300 million riyals of 10-year debt at 3.75 percent.

The central bank had offered 1.5 billion riyals of three-year, 1 billion riyals of five-year, 250 million riyals of seven-year and 250 million riyals of 10-year debt, according to a circular seen by Reuters before the sale. In last month's sale, it sold 1.975 billion riyals of bonds.

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