Antitrust regulators raided the offices of Daimler AG, Volvo AB, and other truck manufacturers as they began to investigate cartel activity. The EC announced that it had reason to believe that truck manufacturers may have operated a cartel or abused their dominant market positions to restrict competition. All five truck manufactures involved in the probe are cooperating with the regulators. The regulators emphasized that the opening of an investigation does not mean that the manufacturers restricted competition.