"Foreign companies view recent investigations and prosecutions as politically motivated," he said.
In an apparent effort to force down consumer prices, regulators have launched investigations of foreign auto, technology, pharmaceutical and dairy companies over the past two years using a 2008 anti-monopoly law.
In the auto industry, investigations appear to have been prompted by complaints prices of imported vehicles are too high and foreign automakers abuse their control over supplies of spare parts to gouge customers.
A spokesman for the Cabinet's planning agency, the National Development and Reform Commission, said investigators concluded Chrysler, a unit of Fiat Chrysler Automobiles NV, and Audi, Volkswagen AG's luxury unit, engaged in unspecified "monopolistic behavior."
"They will be punished accordingly," said the official, Li Pumin, according to the official Xinhua News Agency. The report gave no details of penalties.
Chrysler, Audi and Mercedes Benz, a unit of Germany's Daimler AG, had pre-emptively announced price cuts in response to the investigations.
On Sunday, Mercedes cut prices of replacement parts such as windshields and pumps for power steering by up to 29 percent. Audi announced cuts of up to 38 percent in July. On Tuesday, Chrysler announced a 20 percent price cut for its Grand Cherokee SRT8 and Grand Cherokee 5.7L models.
Imported luxury cars in China can cost three times what they do in the United States or Europe. Automakers say most of the difference is due to import and other taxes.
As for spare parts, automakers control supplies and can charge higher prices because they bar their component suppliers in China from selling to other retailers, said analyst John Zeng of LMC Automotive. He said an automaker might charge as much as 5,000 to 6,000 yuan ($800 to $1,000) that cost 200 yuan ($30) to produce.
"I think there are some monopoly situations there," said Zeng.
Others under investigation in the auto industry include 12 Japanese companies, according to another state news agency, the China News Service.
Business groups welcomed the 2008 law as a step toward clarifying operating conditions in China. Since then, they have said it is enforced more actively against foreign companies than against their Chinese rivals.
Microsoft is under investigation regarding its Windows operating system and how it handles compatibility, bundling and publication of documentation, according to the State Administration for Industry and Commerce.
Microsoft said in a statement it "complies with the laws and regulations of every market" where it operates.