Obama meets Castro as Cuba pushes to end embargo

US President Barack Obama met his Cuban counterpart Raul Castro on Tuesday at the United Nations - all smiles after both renewed their calls for an end to the US trade embargo against Havana.

The leaders of the former Cold War rivals shook hands at the start of what was their second meeting, after an historic encounter in April at the Summit of the Americas in Panama.

Close neighbors but long-time foes, the United States and Cuba restored diplomatic ties in July after a five-decade stand-off, and now must turn their attention to economic relations.

The two countries have reopened their embassies in each other's capitals and are engaged in a dialogue to resolve their remaining political differences, but US trade sanctions remain.

Obama's White House wants to lift the embargo, which prevents almost all trade across the Florida Straits, but conservatives in the US Congress are not ready to forgive the communist island.

After the meeting, the White House said the leaders had discussed the visit last week of Pope Francis, who helped mediate closer US-Cuba ties, to both countries.

And Obama highlighted that, even if the embargo remains, recent US regulatory changes that did not need Congressional approval would allow more Americans to travel and do business in Cuba. 

The White House said these reforms would help Cuba more if they were accompanied by measures from Havana to open its economy.  

"The president also highlighted steps the United States intends to take to improve ties between the American and Cuban peoples, and reiterated our support for human rights in Cuba," it said.