Washington (CNN) The US has ordered two Cuban diplomats assigned to the United Nations to leave the country immediately, alleging that the envoys were engaged in "influence operations against the United States."

"The Department of State today notified the Cuban Ministry of Foreign Affairs that the United States requires the imminent departure of two members of Cuba's Permanent Mission to the United Nations for abusing their privileges of residence," State Department spokeswoman Morgan Ortagus said in a statement. "This is due to their attempts to conduct influence operations against the United States."

The State Department provided no details on the substance of the diplomats' alleged transgressions and whether they occurred in the course of their official work at the global institution in New York City.

The US also announced that all remaining members of Cuba's mission to the UN will have their travel restricted to the island of Manhattan -- the tightest limitations the US currently places on any foreign mission to the UN, according to the State Department. The US has also circumscribed travel by Iranian and Russian diplomats.

A State Department official said Thursday's actions were "consistent with our obligations under the UN Headquarters Agreement, which we take seriously."

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