HONG KONG (Reuters) -U.S. semiconductor manufacturer Qualcomm ( QCOM ) admitted that it had not informed Chinese authorities when it completed its acquisition of Israel's Autotalks in June, China's market regulator said on Sunday.

The disclosure was made two days after China launched an antitrust investigation into Qualcomm ( QCOM ) examining whether the U.S. firm violated China's antitrust law by not declaring some details of its acquisition of the Israeli chip designer.

Qualcomm ( QCOM ) didn't immediately respond to Reuters' request for comment on Sunday.