U.S. Secretary of State Rex Tillerson on Wednesday accused Iran of "alarming ongoing provocations" to destabilize countries in the Middle East as the Trump administration launched a review of its policy toward Tehran.

Tillerson told reporters the review, which he announced on Tuesday, would not only look at Tehran's compliance with a 2015 nuclear deal but also its behavior in the region that he said undermined U.S. interests in Syria, Iraq, Yemen and Lebanon.

His tough words matched those of U.S. Defense Secretary Jim Mattis, who said in a visit to Saudi Arabia on Wednesday that Iran's destabilizing influence would have to be overcome to end the conflict in Yemen.