(Bloomberg) — Payrolls dropped in 31 U.S. states in March, led by a slump in energy producers such as Texas and Oklahoma. The unemployment rate fell in 23.

Payrolls in Texas decreased by 25,400, its first decline since September 2010 and the biggest since August 2009, figures from the Labor Department showed Tuesday in Washington. Oklahoma followed with 12,900 fewer jobs and employment in Pennsylvania fell by 12,700.

The plunge in fuel prices that began in the middle of 2014 has caused oil drillers and miners to cut workforces, prompting reductions among industries in the region. Rough winter weather at the start of the month could have led to job losses in other parts of the country.