Amazon.com has been accused by a U.S. labor board of illegally refusing to bargain with a union representing drivers employed by a contractor, the agency announced on Wednesday. The complaint from the National Labor Relations Board (NLRB) claims that Amazon is a so-called "joint employer" of drivers employed by the contractor,

Amazon has said in the past that it does not have enough control over drivers' working conditions to be considered their joint employer.

Amazon hit with NLRB complaint after deriding finding that drivers are employees. The National Labor Relations Board (NLRB) has filed charges against Amazon, alleging that the e-commerce giant has illegally refused to bargain with a union representing drivers who are frustrated by what they claim are low wages and dangerous working conditions.

The US labour board accused Amazon of illegally refusing to bargain with a union for drivers employed by its contractor, Battle Tested Strategies. The NLRB's complaint points to alleged anti-union tactics by Amazon,

The board had said in August that it had found merit to the union's claims that Amazon exerts control over BTS drivers