The FBI in Detroit executed search warrants at the offices of three Metro Detroit automotive suppliers Tuesday night in connection with an international anti-trust investigation, officials said today.

Quote from the article:

The warrants were executed at the offices of Yazaki North America in Canton Township, Denso International in Southfield and Tokai Rika in Plymouth Township, said Special Agent Sandra Berchtold. Gina Talamona, a spokeswoman for the anti-trust division of the U.S. Justice Department, said her office was investigating "the possibility of an anti-competitive cartel" by automotive electronic components suppliers.

Source: FBI searches 3 local auto suppliers