Also

* Bristol-Myers Squibb Co. said U.S. regulators had begun an informal probe of the company’s German subsidiaries.

* Carlos Slim Helu, Latin America’s richest man, stepped down as chairman of the board of Carso Global Telecom. Slim will remain honorary chairman for life of Carso, which is the parent company of Telefonos de Mexico.

* Rubio’s Restaurants Inc. announced the promotion of Sheri Miksa as president and chief executive. Miksa, who previously was president and chief operating officer, was also appointed to the Carlsbad, Calif.-based company’s board of directors.

* Mazda Motor Corp. said it might release gasoline-electric vehicles in the U.S. using the so-called hybrid technology developed by Ford Motor Co.