The ratio of bids to the amount offered was 3.44, up from prior week's 3.31.
Meanwhile, the Treasury also auctioned $30 billion worth of six-month bills at an interest rate of 0.465 percent, which was the highest in three weeks and up from 0.415 percent the previous week.
The bid-to-cover ratio at the latest six-month T-bill sale was 3.86, up from 3.39 last week.