The number of Americans filing for unemployment benefits unexpectedly fell last week to near a 43-year low, amid a further tightening of the labor market that could eventually spur faster wage growth.

Initial claims for state unemployment benefits dropped 12,000 to a seasonally adjusted 234,000 for the week ended Feb. 4, the Labor Department said on Thursday. That left claims just shy of the 43-year low of 233,000 touched in early November.