Russian President Vladimir Putin began a six-day Latin American tour with a stop in Cuba, a key Soviet ally during the Cold War backs Moscow in its dispute with the West over Ukraine.
The two countries signed about a dozen accords in areas such as energy, industry, health and disaster prevention.
Russian companies will participate in petroleum projects around Boca de Jaruco on the island’s north coast, and that co-operation will extend to offshore oil deposits, Cuban government website Cubadebate said.
Another agreement covered infrastructure at a big new port project that Cuba hopes will become a regional shipping centre and attract much-needed foreign investment.
“We are talking about the possibility of creating in Cuba a grand transportation hub with a possible modernisation of the maritime port of Mariel and the construction of a modern airport with its respective cargo terminal,” Mr Putin said.
Moscow is also forgiving 90% of Cuba’s Soviet-era debt, which totals more than 35 billion US dollars (£20.5 billion). The remainder will be invested in education on the island, Mr Putin added.
The debt agreement is “another great, tangible generosity of the Russian people toward Cuba,” President Raul Castro said.
Cuban state media carried photos in the evening of Mr Putin’s meeting with retired leader Fidel Castro. Mr Putin and Raul Castro also participated in a ceremony at Havana’s Memorial to the Soviet Internationalist Soldier.
Amid the crisis in Ukraine, the countries on Mr Putin’s itinerary have shown themselves to be sympathetic to Russia’s position on the conflict, or at least not overtly critical.
Cuban official newspapers tend to characterise it as a struggle against right-wing extremism threatening ethnic Russians in Ukraine.
Earlier this year, foreign minister Bruno Rodriguez criticised US and EU sanctions imposed on Russian individuals and pro-Russian Ukrainians.
Mr Putin travels next to Argentina, whose president, Cristina Fernandez, accused the US and Britain in March of having a double standard for criticising a pro-Russian secession vote held in Crimea while backing a status referendum in the disputed Falkland Islands.
After that, he goes to Brazil, which was among several nations opposing Russia’s possible exclusion from an upcoming G20 summit in Australia due to the crisis.
“We are grateful to South Americans for the support of our international initiatives, including outer space demilitarisation, strengthening international information security and combating the glorification of Nazism,” Mr Putin said in an interview with Prensa Latina before the trip.
Yesterday he reiterated Russia’s opposition to the 52-year-old US embargo against Cuba, which aims to isolate the communist-run nation economically and financially.
Havana and Moscow have a shared history dating to the Cold War, when they were united by ideology and opposition to U.S. influence.
They drifted apart in the 1990s, however, as the collapse of the Soviet Union ended billions of dollars in trade and subsidies for Cuba.
In December 2000, shortly after his first election, Mr Putin visited the island and pledged to reinvigorate relations.
Russia said in February that it was looking to expand its worldwide military presence, including asking permission for its navy ships to use ports in Cuba and elsewhere in Latin America.
A Russian intelligence-gathering vessel has docked in Havana on multiple occasions in recent months.
Mr Putin plans to attend a presidential summit of the BRICS group of nations in Fortaleza, Brazil, in the coming days.
He will be in Rio de Janeiro tomorrow for the World Cup final and ceremonial handover of host duties for football’s marquee tournament, which next takes place in Russia in 2018.