NATO will give a "proportionate response" in case of aggression against the countries of the Commonwealth, said Wednesday in Washington, NATO Secretary General Jens Stoltenberg.

"NATO will respond to the proportional method in the event of an attack on the countries of the Alliance," He said, answering a question about the use of the fifth article of the NATO Charter. He drew attention that the issue of "collective defence is the cornerstone" for the Commonwealth.

As for the leading role of European countries in resolving the fall in Ukraine, "Stoltenberg said that this situation" is a challenge for Europe, as well as a global challenge ". According to his statement, " the Europeans are playing a leading role in trying to find the exit."

However, He said, " U.S. involvement in this issue useful." NATO chief also said that " Canada is helping Ukraine."

sections: Politics