CAIRO- Average yields on Egypt's three- and nine-month treasury bills rose at an auction on Sunday, central bank data showed.

Yields on the 91-day bills rose to 19.257 percent from 19.171 at the last sale a week earlier, while yields on the 273-day bills rose to 18.838 percent from 18.746.

Appetite for Egypt's domestic debt has grown since the central bank floated the pound currency a year ago. Since then, the CBE has raised key interest rates by 700 basis points.

(Reporting by Arwa Gaballa) ((arwa.gaballa@thomsonreuters.com; +20 2 2578 3290;))