Three delivery drivers for Amazon.com Inc. and Amazon Logistics Inc. filed a putative class-action lawsuit against the online retail giant over the alleged violation of federal labor law, The Wall Street Journal reported Oct. 6.

In the suit, the drivers claimed the company wrongfully classified them as contractors, instead of employees of the company, and are seeking back wages; overtime pay; and compensation for fuel, car maintenance and other expenses.

The plaintiffs reportedly participated in the company's Amazon Flex program that was introduced in 2015.

Meanwhile, a spokeswoman for Amazon.com reportedly said in a statement that the company has received positive feedback from the Flex drivers.