WASHINGTON (AP) - The Associated Press has learned that the Obama administration is increasingly confident that China's government, not criminal hackers, is responsible for the extraordinary theft of personal information about as many as 14 million current and former federal employees and others.

WASHINGTON (AP) The Associated Press has learned that the Obama administration is increasingly confident that China's government, not criminal hackers, is responsible for the extraordinary theft of personal information about as many as 14 million current and former federal employees and others.

One indication is that none of the data has been credibly offered for sale on underground markets popular among professional identity thieves.

Two people involved in the investigation told the AP the U.S. is watching underground markets and finding no trace of the data stolen from the Office of Personnel Management.

The U.S. says that is indirect evidence that spying is actually the motive, not fraud. China has denied it was involved.

Those involved in the probe spoke on condition of anonymity because parts of the case are classified.