An employee inspects the body of a Subaru vehicle on the assembly line at the Subaru of Indiana Automotive Inc., in Lafayette, Indiana.

U.S. industrial production fell more than expected in May on a decline in utilities output and auto manufacturing, the Federal Reserve said on Wednesday, a sign that the economy may be losing some steam in the second quarter.

Industrial output declined 0.4 percent last month after a downwardly revised 0.6 percent increase in April.