The United States and Colombia have recalled their top diplomats from their respective countries amid a deepening rift between Washington and Bogota seemingly centered on an alleged plot to oust the Colombian president.

US-Colombia relations took a turn for the worse Thursday with both sides recalling their top envoys and the South American country’s foreign relations minister quitting unexpectedly.

The U.S. State Department has recalled its top diplomat in Colombia for urgent consultations. The move follows comments from Colombia’s President Gustavo Petro questioning the U.S. stance on an alleged plot to remove him from office.