""Radio Free Europe" reports that an unnamed diplomatic source told that several NATO leaders, including Latvian president Vaira Vike-Freiberga, had tried to make arrangements for bilateral talks concerning this topic with Russian president Vladimir Putin during the summit, but Putin instead attended the CIS energy summit in Minsk, Belarus on 28 November 2006.In contrast, "The Independent" reported that the summit was marred by a diplomat fracas over an invitation to President Vladimir Putin and that he was eventually not invited, and that Putin as a result threatened that he would visit Latvia for the first time since independence during the summit to upstage the summit.