The United Nations has received assurances from the US Government that its communications networks "are not and will not be monitored" by American intelligence agencies, it said.
But chief UN spokesman Martin Nesirky would not comment on whether the world body had been monitored in the past, as reported recently by the German magazine Der Spiegel.
Mr Nesirky said the UN had been in contact with Washington about the reports that surfaced two months ago and has received a guarantee from the US of no current or future eavesdropping.
More top news
Read Sadiq Khan's full victory speech, as the Tooting MP promised to be a mayor for "all Londoners".
Former footballer Frank Worthington has denied he is suffering from Alzheimer's - a day after his daughter said he was.
A list of results for London Mayor and the London Assembly