Iran's lawmakers on Tuesday overwhelmingly approved a bill labeling U.S. forces in the Middle East as terrorist, a day after the U.S. terrorism designation for Iran's Revolutionary Guard formally took effect, state TV reported.

Defense Minister Gen. Amir Hatami introduced the bill authorizing the government to act firmly in response to "terrorist actions" by U.S. forces. It demands authorities use "legal, political and diplomatic" measures to neutralize the American move, without elaborating.

The U.S. move aims at "thwarting Iran's influence," and shows that America's longstanding sanctions against Iran have become ineffective, Hatami told lawmakers.

During the debate, some hard-liner lawmakers had demanded listing the entire U.S. army and security forces as terrorist.

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