In a memo sent Friday to Secretary of State Marco Rubio, Director of National Intelligence Jay Clayton said his teams "have received intelligence that Iran has substantially increased efforts to target U.S. personnel."

The U.S. government has ordered diplomats and other federal employees to leave Saudi Arabia. It is also drawing down staff at other missions in the region.

© Ahmad Al-Rubaye/Agence France-Presse — Getty Images

Secretary of State Marco Rubio held talks with India's foreign minister in Mumbai on Tuesday as the two countries seek to deepen energy cooperation and move closer to finalizing a trade deal.