YEREVAN. -  President of Armenia Serzh Sargsyan will leave for a working visit to Russia on December 18.

As Armenian News-NEWS.am was informed at the press service of the president, in Moscow Serzh Sargsyan will take part in the meeting of the Collective Security Treaty Organization (CSTO), which will take place on December 19.

According to the Kremlin press service, during the session of the Collective Security Treaty Organization the parties will discuss topical international and regional issues, including the situation in Afghanistan, cooperation between member states of the organization, improvements to the system of collective security and collective response to emergency situations.