Qualcomm is being investigated by Chinese regulators for possible violations of the country's anti-monopoly law.
The company said Monday that details of the investigation by the National Development and Reform Commission are confidential.
The San Diego mobile chip maker said that it's not aware of any charge by the commission that Qualcomm has violated the anti-monopoly law. It said it will continue to cooperate with the commission as its investigation proceeds.
Shares of Qualcomm Inc. fell $1.51, or 2 percent, to $71.45 in premarket trading.
