NATO has restricted access to its headquarters for Russian officials, RFE/RL reports.
The move follows NATO's decision last week to suspend all practical cooperation with Russia in response to the Crimean annexation.
The alliance said in a statement that "the formerly extensive access to NATO headquarters will be denied to all representatives of the Russian mission, except the Russian ambassador, his deputy head of mission, and two support staff."
It said that "standard visitor rules" will apply to any other member of Russia's delegation to NATO.
NATO said the decision will come into force on April 8. It will be subject to a review by the alliance's foreign ministers in June.