Venezuelan President Hugo Chavez has travelled to Havana to mark the ten-year anniversary of the signing of the Cuba-Venezuela Comprehensive Cooperation Agreement, Press TV reported.
On Monday, Chavez met with Cuban President Raul Castro in a move that supports the two countries' political, economic and social ties.
Castro said that the Sixth Congress of the Cuban Communist Party would be held next April, which last took place in 1997. The conference is a forum used to launch major policy changes, but had reportedly been postponed as the county dealt with a change in leadership and an economic crisis, AFP stated.
Chavez also met with former Cuban leader Fidel Castro to discuss international politics as well as the relations between their countries, the Havana Times reported.
Venezuela remains Cuba's the primary trade partner, mainly in the health, education, agriculture and energy sectors. The two countries hold trade agreements worth billions of dollars.
Both Chavez and Castro are vocal critics of the United States, accusing it of pursuing imperial policies in Latin America.
The US has repeatedly refused to lift an economic trade embargo on Cuba, imposed on the country since 1960, which stands as the longest lasting embargo in the modern history.
The Venezuelan president had previously blamed the US government of trying to undermine relations between Latin American neighbors.
Additionally, Caracas accused the US of thwarting efforts at reducing the smuggling of Colombian narcotics through Venezuela.
It subsequently ended cooperation with the US Drug Enforcement Agency in 2005, claiming that anti-narcotics efforts have improved since.