The US Federal Reserve has resisted recent speculation that it might consider backing away from monetary tightening amid signs of an economic turnaround.
Four presidents of regional Fed banks have now stressed that there are still no signs of inflation easing.
San Francisco Fed President Mary Daly said it "remains committed and fully united" on the goal of bringing inflation close to the 2 percent inflation target.
Comments by Daly, along with her colleagues Loretta Mester of Cleveland and Charles Evans of Chicago, helped push 10-year Treasury yields to just under 2.8 percent.
They had fallen from 3.0 to 2.6 percent since mid-July.
Fed Chair Jerome Powell was instrumental in this when he said on July 27 that as monetary policy tightened it would "probably become appropriate to slow the pace of interest rate hikes".
Mester told The Washington Post during a live event that she wanted to see "very compelling evidence" that the monthly rate hike is moderating before she could say the Fed's tightening cycle is hitting its inflation-fighting target, Evans told reporters It will still be a few months before a visible improvement in the inflation data supports the assessment that they are on the right track with the tightening of monetary policy.
St. Louis Fed President James Bullard reiterated at an event in New York that the central bank should likely hike interest rates to a range of 3.75 to 4.00 percent by year-end.