The National Labor Relations Board has filed a complaint against Apple Inc., accusing the tech company of hampering union-organizing efforts at a store in New York City. The agency alleges Apple discriminated against employees by monitoring and questioning them about workplace activism and preventing the distribution of pro-union materials, according to a New York Times report.

The complaint stems from a May 2022 filing from the Communications Workers of America, who claimed Apple violated several laws under the National Labor Relations Act, including “restricting the posting of union fliers, and requiring employees to attend mandatory anti-union speeches.” Additionally, the NLRB is accusing Apple of workplace discrimination for selectively enforcing its no solicitation policy against employees participating in or supporting union organizing efforts. A judge has set a hearing for Dec. 13.

Retail workers at Apple stores throughout the US have sought to unionize in cities such as Atlanta, Baltimore, Oklahoma City and Louisville. Staff at the Atlanta Cumberland Mall location tabled their plans, claiming the company hindered their organization efforts through an anti-union campaign, according to the CWA. In June, Apple reportedly shared plans to roll out new policies for retail staff aimed at flexible schedules.

During the past year, Apple has faced several complaints from staff, including one from Janneke Parrish, a former employee who accused the company of firing her for encouraging colleagues to share stories about discrimination and harassment. Parrish filed her complaint with the NLRB in November 2021, following two other Apple employees who filed similar charges with the agency in September.

Neither Apple nor the National Labor Relations Board immediately responded to a request for comment.