PARIS — WikiLeaks published documents late Tuesday that it says show the U.S. National Security Agency eavesdropped on the last three French presidents.

There was no instant confirmation of the accuracy of the documents released in collaboration with French daily newspaper Liberation and investigative website Mediapart.

There was no immediate comment from the offices of French President Francois Hollande or previous president Jacques Chirac, reportedly targeted by the eavesdropping.

U.S. National Security Council spokesman Ned Price said in a statement that the American government would not comment on the specifics of the leak.

“As a general matter, we do not conduct any foreign intelligence surveillance activities unless there is a specific and validated national security purpose. This applies to ordinary citizens and world leaders alike,” he said.

Ever since documents leaked by former NSA contractor Edward Snowden showed in 2013 that the NSA had been eavesdropping on the cellphone of Angela Merkel, it had been understood that the U.S. had been using the digital spying agency to intercept the conversations of allied politicians. Still, the new revelations are bound to cause diplomatic embarrassment for the Americans, even though friends have been spying on friends for thousands of years.

Late Tuesday, several French politicians posted messages to social media voicing their disgust with the reports.

“And one more time we find out that the U.S. has no allies, they only have targets or vassals,” Socialist lawmaker Jean-Jacques Urvoas said in a message posted on Twitter in both French and English.