The United States says it has added Cuba to a blacklist of countries that do not fully cooperate on counterterrorism, denouncing the presence of Colombian leftist guerrillas.

Cuba joins four US adversaries, Iran, Syria, North Korea and Venezuela, in failing to be certified for 2019 under a US counterterrorism law that affects defense exports.

It is the first time that Cuba was not certified since 2015. 

The State Department pointed to the presence of negotiators from Colombia’s ELN rebels, who traveled to Havana in 2017 to negotiate with the Bogota government but have not returned.