Cuba said it was unacceptable that it will not be invited to an upcoming hemispheric summit in Colombia and blamed the United States for insisting that Cuba be excluded.
Colombian President Juan Manuel Santos Venezuela's Hugo Chávez will return home next week from Cuba where he is recovering from surgery to remove a cancerous tumour.
President Hugo Chavez said he will need radiation treatment for cancer in the run-up to Venezuela's October presidential poll though he insisted there was no metastasis after the removal of another tumour.
Venezuelan President Hugo Chavez came out of cancer surgery overnight in Cuba and is recovering in a hospital, two sources said on Tuesday, but there was still no official word on the leader's condition.
Venezuela's President Hugo Chávez said on Tuesday he would have to undergo another operation after doctors in Cuba found a lesion in his pelvis where surgeons removed a large cancerous tumour last year.
The US State Department said on Monday that if Cuba wants to participate in the coming Summit of the Americas to be hosted by Colombia, it must first fully integrate to the Organization of American States and guarantee the basic liberties of its citizens.
The Cuban government has expressed its interest in attending the coming Summit of the Americas scheduled for next April in Cartagena, revealed Colombian Foreign Affairs minister Maria Angela Holguin following a visit to Havana.
The 50th anniversary of the US trade embargo against Cuba on Tuesday was met with little fanfare on the island, where Cubans said it was a failed policy that had succeeded only in making their lives more difficult.
Former Cuban President Fidel Castro presented a two-volume memoir at a public ceremony in Havana, where he referred to the mistake of believing that with socialism all economic problems are solved, official media said Saturday.
Cuban president Raul Castro arrived on Friday to Caracas for the XI summit of the Bolivarian Alternative for the Peoples of America, ALBA, and to participate in the celebration of the twentieth anniversary of the frustrated military coup by then a young Lieutenant Colonel Hugo Chavez, currently Venezuelan president.