Job seekers fill out applications during a job fair in Princeton, Illinois, Jan. 5, 2015.

The number of Americans filing new claims for unemployment benefits tumbled last week to its lowest level in nearly 15 years, adding to bullish signals on the labor market.

Initial claims for state unemployment benefits dropped 43,000 to a seasonally adjusted 265,000 for the week ended Jan. 24, the lowest since April 2000, the Labor Department said on Thursday. It was the biggest weekly decline since November 2012.