Mexican President Claudia Sheinbaum said Tuesday her government has at least temporarily stopped oil shipments to Cuba, AP reports.

She said the pause was part of general fluctuations in oil supplies and that it was a “sovereign decision” not made under pressure from the US.

Sheinbaum was responding to inquiries on whether the state oil company Pemex had cut off oil shipments to Cuba in the wake of mounting pressure from US President Donald Trump that Mexico distance itself from the Cuban government, though US officials have not publicly requested that Mexico stop the oil.

“Pemex makes decisions in the contractual relationship it has with Cuba,” Sheinbaum said in her morning news briefing. “Suspending is a sovereign decision and is taken when necessary.”

Earlier, US President Donald Trump said the Cuban government is ready to fall, and that the island would receive no more oil shipments from Venezuela after a US military operation that took former Venezuelan President Nicolas Maduro prisoner.