According to RIA Novosti, this is stated in Nebenzi's letter.
“We call on the members of the Security Council to oppose the attempt by some delegations to undermine the integrity of the UN Charter, putting at risk the authority of the Security Council and the UN as a whole, and to demand that the Secretariat refrain from participating in any form of “investigation” regarding allegations of alleged violations of Resolution 2231,” it says. in circulation.
The Permanent Representative notes that the secretariat does not have authority for such events.
Earlier, the Russian permanent mission to the UN stated that the UN Security Council did not give sanctions to the secretariat of the organization to conduct an investigation into the alleged use of Iranian drones in Ukraine.