The 10-year note fell 08/32 to 99-28/32 for a yield of 4.51%, while the 30-year bond sank 19/32 to 109-20/32 for a yield of 4.72%.
Reports of a shooting near an airliner in Miami, Florida prompted some flight to safety late in the session. Equities were trading lower amid profit taking.
The Treasury's $11 billion 7-day cash management bills were awarded at 4.08%, 8 basis points cheaper than the last CMB on Nov. 30. Wednesday's offering was covered 3.05 times, close to the 3.24 from the prior sale. Indirect bidders took 6.8% of the bills, while direct bidders took 22.7%.
An $8 billion 10-year Treasury bond reopening is scheduled to take place on Thursday.
Investors continued making their bets on interest rates ahead of the Federal Open Market Committee's meeting next week. The Fed has already raised rates 12 times since 2004 in an effort to control inflation by making debt more expensive.