Russian Ambassador to the UN Vitaly Churkin died at the age of 64, just a day before his 65th birthday, in New York on Monday, Sputnik reported.
"A prominent Russian diplomat has passed away while at work. We'd like to express our sincere condolences to Vitaly Churkin's family," Russian Ministry of Foreign Affairs said in a statement available on its official website.
No further details are available at the moment.