CAIRO, March 30 (Reuters) - Average yields on Egypt's six-month and one-year treasury bills declined at an auction on Thursday, data from the central bank showed.

The average yield on the 182-day treasury bills fell marginally to 19.373 percent from 19.379 percent at the previous auction, and the yield for the 364-day treasury bills dropped to 19.173 percent from 19.200 percent in a similar auction.

(Reporting by Eric Knecht; Editing by Alison Williams) ((eric.knecht@thomsonreuters.com; +20 2 2394 8102; Reuters Messaging: eric.knecht.thomsonreuters.com@reuters.net))