President of Kazakhstan Nursultan Nazarbayev pointed at a political “incident” with Armenia's accession to Customs Union, Izvestiya newspaper reported.

“There is an unpleasant topic. Not to instigate a person in Azerbaijan [Azerbaijani President Ilham Aliyev - Izvestiya],  you joined the WTO this way, and you need to join the Eurasian Union within the borders recognized by the UN, with the reservation [without Nagorno-Karabakh and several other areas of the former Azerbaijan SSR – Izvestiya],” Nzarbayev said.

The treaty on establishment of Eurasian Economic Union was signed by the leaders of Russia, Belarus and Kazakhstan in Astana on Thursday. President Serzh Sargsyan participated in the meeting of Supreme Eurasian Economic Council and offered to sign a treaty on Armenia's accession till June 15, 2014.