NATO Secretary General Jens Stoltenberg called for a revision of the rules of European security after the incident with the Russian Su-24, Lenta.ru reports citing the Associated Press.
"The reality is that a set of rules for European security is obsolete," Stoltenberg said. He added that "this is not a new cold war," but a "signal".
The Secretary General is confident that it is necessary to revise the agreement on the "highest level of transparency and prediction" of military activity in Europe.