HAVANA (AP) — Former Cuban President Raúl Castro is involved in talks between the island and the United States, and they’re still in the early stages, Cuban President Miguel Díaz-Canel said Wednesday.

The talks come amid increasing tensions between the two nations, with Cuba plagued by nationwide blackouts resulting from a crumbling power grid and an ongoing oil blockade implemented by U.S. President Donald Trump, who has threatened tariffs on any country that provides oil to Cuba and recently said he’d have “the honor of taking Cuba” soon.

The talks overall are being handled collectively by the Cuban government, Díaz-Canel told Spanish leftist leader Pablo Iglesias in a videotaped interview that lasted more than an hour and was shared by state media.

Iglesias was in Cuba as part of a delegation of some 600 activists from 33 countries who arrived last week to deliver humanitarian aid.

“A process of conversations that leads to an agreement is a long process,” Díaz-Canel told Iglesias, who produced the interview for his crowdfunded TV channel, Canal RED.

“First, we must build a channel for dialogue. Then, we must build common agendas of interests for the parties, and the parties must demonstrate their intention to move forward and truly commit to the program based on the discussion of those agendas,” Díaz-Canel said.

Although the initial threats were formally softened, the embargo has remained in place, and the island has not received any fuel shipments in the past three months.

Prolonged power outages and a near-paralysis of economic and social life are the visible consequences on the island, which in the last week experienced two nationwide blackouts that left millions without electricity as Cuba’s power grid continues to crumble.

The U.S. has said that Cuba was in negotiations, and Trump has threatened that he would take over the island soon.

Díaz-Canel was more nuanced in his response and said his officials and those from the U.S. State Department “held recent talks.”

He also addressed speculation surrounding the role that Castro, 94, would be playing a role in these overture.

“The other thing they’ve tried to speculate about is that there are divisions within the leadership of the revolution,” Díaz-Canel said, not clarifying who he was referring to.

Castro “is one of those who, along with me and in collaboration with other branches of the (Communist) Party, the government, and the State, has guided how we should conduct this dialogue process, if this dialogue process takes place,” the president added.

He noted that Castro is “the historical leader of this revolution, even though he has relinquished his responsibilities,” and that he maintains a “prestige earned with the people” due to “historical recognition that no one can deny.”

Raúl Castro, who succeeded his brother, Fidel, as president, led historic talks with former U.S. President Barack Obama in 2014 that led to the reopening of embassies and re-establishment of diplomatic relations.

Trump has opposed such policy, tightening sanctions even further, exacerbating a deep economic crisis to the extreme of the current energy blockade.

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