Former Cuban leader Fidel Castro on Wednesday slammed the Organization of American States (OAS) as a "US Trojan horse," despite the group's decision to lift suspension against the island country.

Castro, who ruled Cuba from 1959 to 2006, ruled out Cuba's potential return to the body.

The OAS was "complicit" in all the crimes committed against Cuba and against other Latin American nations by Washington, he said in a an article published in Wednesday's state-run media.

Cuba was barred from attending OAS meetings in 1962, three years after its revolution, as part of a broader US economic and political blockade against the island.

Castro's article argued that the OAS served only to help the US interfere with other nations in the region, and called for the organization to be dissolved.

"It is naive to think that the good intentions of one president justifies the existence of a body that... supported... neoliberalism, drug trafficking, military bases and economic crises," Castro said.

Since the January inauguration of Barack Obama as US president,  Cuba-US relations have warmed but remain tense. Washington has lifted US restrictions on travel and cash remittances to Cuba for Cuban-Americans with relatives on the island.

The OAS on Wednesday scraped the suspension against Cuba. The move, backed by Washington, was considered part of the US efforts to soothe Cold War tension.