Moscow  - Cuban President Raul Castro is due in Moscow on Wednesday for a week-long visit, the Kremlin press service said Monday, in the latest sign of reviving relations between the Cold War allies.

President Dmitry Medvedev extended Castro the invitation while on a visit to Havana in November.

Many see Moscow's warming ties with the small communist island, long an arch-foe of the United States, as a snub of Washington in anger over US missile defence plans and post-war aide to Georgia.

Havana  - Cuban President Raul Castro wished new US President Barack Obama luck as he takes the helm in Cuba's neighbour and declared enemy.

"He looks like a good man, I hope he is lucky," Castro said.

However, he declined to provide further details of his plans for new times in the difficult US-Cuban relations.

Havana - Cuban President Raul Castro received Argentina President Cristina Fernandez de Kirchner in the first such meeting between the heads of state of both countries since 1986. The four-star general accorded Fernandez military honours in the Palace of the Revolution before the two witnessed the signing of several cooperation agreements on science, technology, energy and food.

Fernandez visited the Genetic Engineering and Biotechnology Centre outside Havana which produced vaccines, some of which are sold in Argentina.

Havana  -

Santiago de Cuba  - President Raul Castro declared Thursday that the Cuban revolution after 50 years was "stronger than ever despite the obsessive and revengeful hate of the United States."

Despite the current difficult times, the revolutionary movement had moved barely a millimetre from its principles, the younger brother of the ailing revolutionary leader Fidel Castro said at the formal celebration of the anniversary.

Brasilia  - Cuban President Raoul Castro, on his first official foreign visit since taking power in February, Thursday suggested that Havana and Washington could consider a possible prisoner exchange to start a thaw in relations between the two countries.

Castro, who took over leadership of the communist country in February from his ailing brother, revolutionary leader Fidel Castro, made the remarks after meeting Brazilian President Luiz Inacio Lula da Silva.