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.

President José Raúl Mulino on Thursday denied a claim by the Trump administration that the Central American country had agreed to eliminate tolls for U.S. government ships using the Panama Canal, in an apparent setback to U.

The Panama Canal Authority said in a statement late on Wednesday that it had not made any changes to charges or rights to cross the canal, after the U.S. State Department said that U.S. government vessels could transit the crossing without being subject to such fees.