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The average yield on 91-day treasury bills increased to 11.613 percent from 11.444 percent at last week's auction, the central bank said.
The yield on 273-day treasury bills rose to 12.672 percent from 12.413 percent at the Aug. 18 auction.
The central bank sold 2 billion Egyptian pounds ($286 million) of the 91-day bills and 4 billion pounds of the 273-day bills, the amounts it had asked for.
Hundreds of people were killed when the pro-Mursi sit-ins were dispersed on Aug. 14 and in subsequent protests.