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U.S. Defense Secretary Jim Mattis reviews the honour guard before a meeting with Japan's Defense Minister Tomomi Inada at the Defense Ministry in Tokyo, Japan, February 4, 2017. REUTERS/Toru Hanai

(reuters_tickers)

TOKYO (Reuters) - U.S. Defense Secretary Jim Mattis said on Saturday he was not considering hiking the number of U.S. forces in the Middle East to address Iran's "misbehaviour" at this time, but warned that the world would not ignore Iranian activities.

President Donald Trump has vowed a more aggressive policy against Tehran and his administration is warning of concrete action if Iran does not curb its ballistic missile program and continues support in regional proxy conflicts.

(Reporting by Phil Stewart; Editing by Nick Macfie)

Reuters