Roughly 37,000 AT&T workers -- less than 14 percent of the company's total workforce -- began a three-day strike on Friday after failing to reach an agreement with the No. 2 U.S. wireless carrier over new contracts. Reuters reports: This is the first time that AT&T wireless workers are on strike, which could result in closed retail stores during the weekend, according to the Communications Workers of America (CWA) union. The workers on strike are members of the CWA. The workers are demanding wage increases that cover rising healthcare costs, job security against outsourcing, affordable healthcare and a fair scheduling policy. Slightly over half of the workers on strike are part of the wireless segment and the rest wireline workers, including a small number of DirecTV technicians, AT&T spokesman Marty Richter told Reuters. The CWA had said on Wednesday that wireless workers across 36 states and Washington, D.C. would walk-off their jobs if an agreement was not reached by Friday 3 p.m. ET.