FedEx has been hit with another lawsuit by a group of delivery drivers who claim the nation’s second-largest parcel delivery company is skirting federal law by not paying overtime.

The lawsuit claims that certain drivers employed through intermediary entities FedEx calls “independent service providers” are, in fact, FedEx employees under the Fair Labor Standards Act. The 11-page collective action lawsuit was filed in U.S. District Court for the District of Connecticut Thursday on behalf of three drivers.