Anti-trust investigations already underway in the auto and telecommunications sectors have spread to other industries also, including a number of cement and medical companies, state-run China Daily reported.
Besides the recent high-profile cases, the probes into domestic companies are also being done and a monopoly case involving a state-owned company will be disclosed soon, an official at the National Development and Reform Commission was quoted as saying by the Daily.
BMW, Volkswagen's Audi, Daimler's Mercedes-Benz, Tata Motors' Jaguar Land Rover, Fiat's Chrysler, Toyota and Honda have all announced price cuts for vehicles or spare parts in July and early August.
Besides the auto firms, Chinese officials have placed companies like Microsoft under anti-trust violation probe.
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FAW-Volkswagen's Audi division may face a fine of 1.8 billion yuan (USD 292 million) for operating a monopoly, The Economic Observer reported.
Recent high-profile anti-trust cases have sparked concerns over China's monopoly efforts, with some foreign businesses complaining that they are being targeted unfairly.
The NDRC official, however, said that the investigations, some of which began in 2011, are not aimed at any specific type of industry or a specific country.
"Investigations in many industries started with domestic companies and then spread to foreign companies," he said.
He did not disclose the sector in which the state-owned company is and only disclose that it is not in the auto industry.
The official said many domestic automakers are under scrutiny, but the problem here is not as obvious as that involving their international peers, partly due to their small market share.
Domestic-brand automakers accounted for less than 20 per cent of China's auto sales in the first half of this year, the China Association of Automobile Manufacturers says.