The office of West Virginia Gov. Joe Manchin (D) confirmed Friday that federal investigators have served two subpoenas on the state. The office provided no details but said in a statement, “Neither subpoena was directed to Governor Manchin or the Governor’s Office.”

“I have not been advised that the governor or any other state employee is under investigation,” Manchin spokesman Melvin Smith told the Charleston Daily Mail. “The investigators asked state officials to not discuss any details of the request publicly at this time. The state officials were informed that any such disclosure could endanger or impede the investigation.”

The probe was first revealed by Watchdog.org, a website operated by a nonprofit organization. Citing an unnamed source, it reported that the U.S. attorney’s office was conducting the probe and “the target may be Manchin himself.”

According to that website, “The subpoenas asked for contracts and records for businesses that have done work at the governor’s mansion as well as provided services for parties there. The investigation is into whether Manchin has complied with bidding and state contract requirements.”

The development has significance beyond Charleston since Manchin is considered the frontrunner in the special election to fill the seat of the late Sen. Robert Byrd (D).