(Reuters) Russian President Vladimir Putin said on Wednesday the U.S. Congress had no right to approve the use of force against Syria without a decision from the U.N. Security Council, and that doing so would be an “act of aggression”.

He said “anything that is outside the U.N. Security Council is aggression, except self-defense. Now what Congress and the U.S. Senate are doing in essence is legitimizing aggression. This is inadmissible in principle.”

In remarks that could raise tension further before he hosts President Barack Obama and other G20 leaders on Thursday, Putin also said U.S. Secretary of State John Kerry lied to Congress about the militant group al Qaeda’s role in the Syrian conflict.

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