DES MOINES (AP) — Wind energy equipment manufacturer Siemens Energy Inc. will lay off 615 workers in Iowa, Kansas and Florida in part because Congress has not renewed a tax credit for wind energy, the company said Tuesday.

Siemens said the biggest job losses will come in Fort Madison where 407 workers at a wind-turbine blade factory will be out of work. About 220 workers will be retained at the plant to support ongoing operations, spokeswoman Melanie Forbrick said in a statement.

About 146 workers are affected in Hutchinson, Kan., leaving 152 still working. In Orlando, Fla., about 62 workers will lose their jobs and about 150 will remain.