WASHINGTON - American employers added no net workers last month and the unemployment rate was unchanged, a sign that many were nervous the U.S. economy is at risk of slipping into another recession.

The U.S. Labour Department says total payrolls were unchanged in August, the weakest report in almost a year. It's the first time since February 1945 that the government has reported a net job change of zero.

The unemployment rate stayed at 9.1 per cent.

A strike by 45,000 Verizon workers lowered the job totals. Those workers are back on the job.

Job gains in June and July were revised lower, to show 57,000 fewer jobs added. The downward revisions were all in government jobs. The average work week also declined and hourly earnings fell by three cents to $23.09.