US Professor Piero Gleijeses joined the international demand for immediate release of the Cuban antiterrorists that have been jailed in his country for 15 years, for preventing execution of violent plans in the Caribbean island.

Gleijeses recalled in a letter to President Barack Obama that Gerardo Hernandez, Antonio Guerrero, Fernando Gonzalez and Ramon Labañino were sentenced in a viced court to long years in prison, the International Committee for the release of those men reported.

They and their freed compatriot Rene Gonzalez were arrested on September 12, 1998, while they were supervising violent groups in the south of Florida that were planning actions there as those that have caused 3,400 victims in Cuba in the last 53 years.

The four antiterrorists are still facing severe sentences, while Rene Gonzalez was released from prison on October 7, 2011, after serving his term, and returned to his homeland in May, when he gave up his US citizenship to put an end to an additional punishment of three years on parole.

In his letter, Gleijeses urged Obama to understand that the trial against the Cubans was politicized and enforce his executive power to end the imprisonment.

He also referred to Cuban's solidarity with African countries that were fighting for their independence and also to the hostile stance of the White House, which encouraged the invading troops.

Piero Gleijeses is teacher of Foreign Policy of the United States at Johns Hopkins University and is the author of several books about his country's intervention in several nations of the world.