The Trump administration is weighing new restrictions on Cuban government officials who travel to New York for United Nations business as Washington continues increasing economic and diplomatic pressure on Havana.

U.S. officials and an internal State Department document obtained by The Associated Press indicate that the department is considering “strict controls” on Cuban officials expected to return next month for the annual U.N. General Assembly vote on the U.S. economic embargo against Cuba. The details have not been finalized, and the officials spoke anonymously because the policy remains under consideration.

The potential restrictions come as President Donald Trump has made changing Cuba’s political system a stated objective of his administration. During his address to the U.N. this week, Trump again described Cuba as a “failed state” and said he was seeking a “fundamental change” in the country, adding that “freedom will be coming to Cuba.”

Cuban Foreign Minister Bruno Rodríguez sharply criticized the administration’s approach Thursday, accusing Washington of imposing increasingly severe economic measures on the Cuban population. Rodríguez specifically condemned the Trump administration’s restrictions on fuel imports, which Havana says have contributed to repeated power-grid failures and widespread electricity shortages.

Rodríguez said Cuba remains willing to maintain diplomatic channels with Washington, although he acknowledged that no new meetings are currently scheduled. He said previous discussions had been respectful but argued that subsequent U.S. statements and policy decisions had become increasingly aggressive.

The administration has also expanded economic penalties affecting Cuban industries and tightened enforcement of restrictions on Americans conducting business with Cuban government-owned or affiliated entities. At the same time, Havana has pursued economic reforms that have expanded the role of private businesses, although Cuban officials maintain those changes are not concessions to Washington.

Cuban officials already face significant restrictions when operating in the United States because Cuba remains designated as a state sponsor of terrorism. Cuban diplomats are generally restricted to a 25-mile radius around the U.N. headquarters in Manhattan. New controls could make next month’s General Assembly vote more difficult for Havana’s delegation to attend.

The annual vote has traditionally produced overwhelming international opposition to the U.S. embargo, although last year several countries, including Argentina, Ukraine and Hungary, voted against the Cuban-backed resolution. The General Assembly’s resolutions are not legally binding, but they serve as a measure of international sentiment toward U.S. policy on Cuba.