Story highlights Virginia Gov. Terry McAuliffe is the subject of a federal investigation contributions

MacAuliffe has not been contacted by authorities, but a spokesman said he will fully cooperate if he is

Washington (CNN) Virginia Democratic Gov. Terry McAuliffe is the subject of an ongoing investigation by the FBI and prosecutors from the Justice Department's public integrity unit, U.S. officials briefed on the probe say.

The investigation dates to at least last year and has focused, at least in part, on whether donations to his gubernatorial campaign violated the law, the officials said.

McAuliffe wasn't notified by investigators that he is a target of the probe, according to the officials.

"The Governor will certainly cooperate with the government if he is contacted about it," said Marc Elias, attorney for McAuliffe campaign, in a statement to CNN.

As part of the probe, the officials said, investigators have scrutinized McAuliffe's time as a board member of the Clinton Global Initiative, a vehicle of the charitable foundation set up by former President Bill Clinton.

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