CAIRO, Feb 26 (Reuters) - Average yields on Egypt's three-month and nine-month treasury bills rose at an auction on Sunday, data from the central bank showed.

Yields on the three-month bills rose to an average of 19.094 percent from 18.493 percent at the previous similar auction.

Yields on the nine-month bills also increased, to 19.742 percent from 18.771 percent at the last similar auction.

(Reporting by Lin Noueihed; Writing by Nadine Awadalla; Editing by Mark Potter) ((lin.noueihed@thomsonreuters.com; +202 2 394 8039; Reuters Messaging: lin.noueihed.thomsonreuters.com@reuters.net))