BREAKING: U.S. State Dept. issues Worldwide Caution amid Middle East tensions

🚨NBC News is reporting Iran warned Pres. Trump it would activate "sleeper-cell terror inside the United States if it were attacked."

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BREAKING: Russian President Vladimir Putin meets Iranian Foreign Minister Araqchi in Moscow. Putin tells Araghchi: Please convey my best wishes to the President and the Supreme Leader of Iran.

🚨 DEVELOPING:* The headquarters belonging to Iran’s Islamic Revolutionary Guard Corps was just struck by numerous IDF airstrikes.

Hundreds of Revolutionary Guard soldiers were reportedly eliminated.

WHITE HOUSE PRESS SEC: "We are confident, yes, that Iran's nuclear sites were completely and totally obliterated ... We have a high degree of confidence that where those strikes took place is where Iran's enriched uranium was stored.

"This operation was a resounding success."

WH PRESS SEC: "This strike on Saturday did make our homeland safer because it took away Iran's ability to create a nuclear bomb. This is a regime that threatens 'death to America."

"They no longer have the capability to build this nuclear weapon and threaten the world."

🚨 BREAKING: Qatar has shut down its airspace. Earlier, the US Embassy in Doha warned Americans to "shelter in place until further notice."

Iran is vowing retaliation against US interests in the Middle East.

RENINDER: Qatar hosts the largest U.S. military base in the region.

🚨🚨 DEVELOPING: ENTIRE MIDDLE EAST ON EDGE AS IRAN VOWS RESPONSE.

Airspace over Qatar is totally empty.

FLASH: Shelter in place issued for Americans in Qatar.