MOSCOW, September 29 (RIA Novosti) - The Collective Security Treaty Organization (CSTO), a security alliance between seven former Soviet republics, has urged Georgia to free four Russian servicemen detained in the country, the CSTO secretariat said Friday.

Four Russian officers were detained Wednesday on spying allegations, sparking a row between Tbilisi and Moscow.

The CSTO said in a statement released after consultations between member countries' representatives that parties "expressed concern over the escalating situation, which could lead to unpredictable consequences, and called on the Georgian side to take a considered approach to resolving the current problem, and called for the immediate release of the Russian servicemen detained in Georgia."

The consultations were held through an extraordinary session of the CSTO Permanent Council, chaired by Secretary General Nikolai Bordyuzha.

The CSTO comprises Armenia, Belarus, Kazakhstan, Kyrgyzstan, Russia, Tajikistan and Uzbekistan.

Two court sessions to decide whether four Russian servicemen accused of espionage should be remanded in custody will be held Friday behind closed doors.