Updated

Three of the world's leading package delivery businesses are being investigated by France's competition watchdog.

U.S.-based FedEx, TNT Express from the Netherlands and Britain's Royal Mail are all under investigation for unidentified malpractices.

Yannick Le Dorze of the French Competition Authority said Wednesday that an investigation is underway, but would not name the companies targeted or say what they are suspected of doing.

TNT Express and Royal Mail said in statements they could suffer "material" losses after receiving a notice from the French authority alleging breaches of anti-trust rules.

Fedex said it received a notice June 30 about an investigation into "anticompetitive behavior that is alleged to have occurred primarily in the framework of trade association meetings" involving general managers of Tatex, which was bought by Fedex in 2012.