An anonymous reader writes "Russian regulators will not let Google buy a local online advertising company, halting a $140 million deal agreed to in July. Google had planned to acquire Zao Begun, which has a search and contextual video and text advertising business. Begun is owned by Rambler Media, a Russian company that own various Web sites and runs a search engine. Google said it is reviewing the decision of Russia's Federal Antimonopoly Service (FAS) and hasn't decided how to react. Slashdot has previously covered some of the issues surrounding Google's muscle in the advertising market."