Panamanian President José Raúl Mulino on Thursday denied the U.S. State Department’s claim that his country had agreed to allow U.S. government vessels to transit the Panama Canal for free, an assertion that has upended the two countries’ talks on the waterway.

The Panama Canal Authority late Wednesday said it has made no change to its tolls or other fees, denying the Trump administration claim that it has agreed to no longer charge U.S. government vessels for using it.

The Panama Canal Authority put out its own terse statement saying it had “not made any adjustments” to the fees.