"Most districts said that wages increased at a modest pace," the U.S. central bank said in its periodic Beige Book report on the economy. "A few districts observed that firms were raising wages in a broader range of industries and positions since the previous report."

Several regional Fed districts noted increases in manufacturing, construction, and transportation input costs, according to the report. Some reported expectations of further wage increases in the coming months, though prices pressures were still mixed, the Fed said.

"Firms in some districts noted an ability to increase selling prices. Retailers in some districts reported modest price increases and there were reports of rising home prices across the country," the Fed said.

It added that agriculture and energy commodity prices were mixed.

The Dallas Fed, however, reported that its regional economy accelerated to a "robust" pace over the past six weeks, with manufacturing, retail, non-financial services and energy gaining momentum. Hiring picked up and wage and price pressures in the district remained elevated.

It is unclear whether the report will alleviate the Fed's concerns about tepid inflation, which has remained below the central bank's 2 percent target for more than five years.

Despite still weak inflation overall, Fed policymakers currently expect to raise interest rates three times this year. The central bank raised rates three times in 2017 against a backdrop of steady growth and low unemployment.

The majority of Fed policymakers appear to be putting more emphasis on the need to raise rates given the economy is at or near full employment rather than waiting until inflation appreciably rises.

U.S. job growth slowed more than expected in December amid a decline in retail employment, but a pick-up in monthly wage gains pointed to labour market strength that could pave the way for the Fed to increase rates in March.

((Reporting by David Lawder; Editing by Paul Simao) ((David.Lawder@thomsonreuters.com; +1 202 354 5854;)))

By David and Lawder