U.S. Secretary of State Marco Rubio on Sunday warned Panama's President Jose Raul Mulino that Washington will "take measures necessary" if Panama does not immediately take steps to end what President Donald Trump sees as China's influence and control over the Panama Canal.

Mulino, after the talks with the top U.S. diplomat in Panama City, signaled he would review agreements involving China and Chinese businesses, and announced further cooperation with the U.S. on migration, but reiterated that his country's sovereignty over the world's second busiest waterway is not up for discussion.

Rubio delivered a message from Trump that China's presence — through a Hong-Kong based company operating two ports near the canal's entrances — was a threat to the waterway and a violation of the U.S.-Panama treaty, the U.S. State Department spokesperson Tammy Bruce said in a statement.