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WASHINGTON — The Pentagon is sending a slew of additional weaponry to the Middle East, including more warships, air defenses and submarines, in preparation for a possible military strike on Iran if President Donald Trump makes that decision,

MOSCOW, Feb 19 (Reuters) - Russia said on Thursday that it was seeing an unprecedented escalation of tension around Iran as the United States moved military assets into the Middle East, and the Kremlin urged both Tehran and "other parties" to exercise prudence and restraint.

Crude prices rise amid U.S.-Iran tensions, with the White House saying Tehran would be "very wise" to make a deal. CNBC's Dan Murphy joins "Squawk Box Europe" to discuss the latest developments.

The U.S. military is prepared to strike Iran as early as this weekend, though President Donald Trump has not made a final decision. The post US military ready to strike Iran as Trump weighs decision:

WASHINGTON, Feb 18 (Reuters) - Iran is expected to submit a written proposal on how to avoid its standoff with the United States in the wake of U.S.-Iran talks in Geneva on Tuesday, a senior U.S. official told Reuters on Wednesday.

Stock futures fell Thursday, giving back some of the gains from the previous session, as a disappointing outlook from Walmart weighed on sentiment along with simmering tensions between the U.S. and Iran. Futures tied to the Dow Jones Industrial Average lost 124 points, or 0.3%. S&P 500 futures slipped 0.2%, while Nasdaq 100 futures dropped 0.4%.