Federal Reserve economic projections were "inadvertently" posted to the central bank's website last month, the Fed said on Friday.
Part of that update included staff economic forecasts that are confidential FOMC information, but nonetheless was being kept online "because the information has already been released," the Fed said in a press release.
Staff at the Federal Reserve board see a single quarter-point U.S. rate hike by year's end, inflation stuck in low gear for five more years, and an economy growing more slowly than expected by U.S. policymakers.
Consistent with security procedures, the Fed said that the mistaken early release had been referred to the Board's Inspector General.
—Reuters contributed to this report.