DES MOINES, Iowa (AP) — About 300 workers at Anderson Erickson Dairy in Des Moines went on strike after voting to reject the company’s latest contract offer.

Des Moines Register reports (http://dmreg.co/ULRimt) Mike Klootwyk, the vice president of Teamsters Union Local 120, said the contract would have required workers to accept a pay freeze and to pay significantly more for health care insurance. Workers rejected it Sunday evening.