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A top Cuban official says months of negotiations with the United States have hit a wall, with no progress toward ending the sanctions that are strangling the island’s economy.

Some shit you should know before you dig in: If you’re unaware, the United States has kept a total trade embargo on Cuba since the 1960s, but Trump has ramped up the pressure significantly since returning to office. Trump has openly said that he’s seeking regime change in Cuba, and in late January he ordered a fuel blockade, effectively cutting off the island’s supply of foreign oil by warning he’d slap tariffs on any nation that keeps selling it fuel (only one Russian tanker has reached Cuba since). The resulting shortages have deepened blackouts that can drag on for as long as 40 hours straight, halted public transportation in some areas, and left hospitals struggling to keep the lights on. Talks between the two sides began earlier this year, with reports that Trump was seeking the resignation of Cuban President Miguel Díaz-Canel (a demand the Cuban government has publicly refused).

What’s going on now: Speaking at a press conference on Tuesday, Cuba’s Foreign Minister Bruno Rodríguez said that the negotiations have gone nowhere, even as Cuba insists it remains open to dialogue. “The conduct of US government delegations — generally respectful — has been accompanied by constant threats against Cuba, the application of coercive measures, and offensive statements regarding our country’s independence,” Rodríguez said.

He said the US sanctions were “causing deaths” in Cuba, pointing to an economy in collapse and crippling shortages of food, fuel, medicine, and power for the island’s roughly 9 million residents. His remarks echoed those of the UN’s high commissioner for human rights, Volker Türk, who noted last week that the infant mortality rate had nearly doubled to about 9.9 per 1,000 births.

This all comes as the Trump administration is pressing forward with more sanctions. In early June, it sanctioned Díaz-Canel, his wife and stepson, along with relatives of former President Raúl Castro, and issued an arrest warrant against Castro over the 1996 shootdown of two activist planes that killed four. Trump also hit the island’s state oil company with sanctions.

Secretary of State Marco Rubio, a Cuban American hawk, blamed Havana’s own mismanagement for the crisis, arguing Cuba’s “Communist leaders have diverted energy resources to line their own pockets.”