This Oct. 28, 2013 file photo shows the US Consulate General in Frankfurt, Germany. WikiLeaks on Tuesday, March 7, 2017 published thousands of documents purportedly taken from the Central Intelligence Agency's Center for Cyber Intelligence, a dramatic release that appears to expose intimate details of America's cyberespionage toolkit. (Boris Roessler/dpa via AP, file)

Germany's federal prosecutors say they are examining a WikiLeaks report suggesting that the Central Intelligence Agency used the U.S. consulate in Frankfurt as a base for covert hackers.

The federal prosecutors' office says the reports published Tuesday are being reviewed, but that this is a standard procedure.

Prosecutors said Wednesday that "if it turns out there is an initial suspicion of a concrete crime committed by a specific person then a preliminary investigation may be opened."

German foreign ministry spokesman Sebastian Fischer said authorities were trying to verify the authenticity of the alleged CIA documents published WikiLeaks.

"The rest remains to be seen," he said.

Relations between Berlin and Washington took a hit after Edward Snowden's revelations about NSA eavesdropping. It later transpired Germany had partly cooperated with the NSA.