The National Labor Relations Board has issued a complaint against Amazon, alleging that the company illegally threatened, surveilled, and interrogated workers who were trying to start a union at its Staten Island, New York facilities. The company also reportedly hired a union avoidance consultant who told workers that the union organizers were’thugs’.

Motherboard’s report details alleged incidents between Amazon and union organizers. Security guards kept organizers from distributing leaflets that discussed unions. Amazon will either have to settle this case or have it go to trial.

The nationalrb has had several other disputes with Amazon around labor law. In December, the company agreed to post notices to current and former employees about their rights to join a union. Amazon also agreed to change rules that made it difficult for workers to organize together.

The NLRB sent the verge a statement from Kathy drew King, regional director for region 29 about its complaint. The NLRB said the verge was filing a complaint.

The complaint seeks to stop and remedy this unlawful conduct to ensure that Amazon’s employees can freely and fairly exercise their rights under the National Labor Relations Act.

Amazon did n’t immediately respond to the verge’s request for comment. Motherboard reports that an Amazon spokesperson denied the allegations.