The State Department has doubled the number of emergency evacuation flights it is providing for American citizens wishing to leave Israel, ordered the departure of nonessential staff from the U.S. Embassy in Lebanon and is stepping up travel warnings around the Middle East because of concerns Iran will retaliate against U.S. interests in the region for the weekend strikes on its nuclear facilities, Associated Press reported.

In an alert sent to all Americans worldwide and posted to its website on Sunday, the State Department warned all U.S. citizens abroad to exercise caution.

“The conflict between Israel and Iran has resulted in disruptions to travel and periodic closure of airspace across the Middle East,” it said. “There is the potential for demonstrations against U.S. citizens and interests abroad. The Department of State advises U.S. citizens worldwide to exercise increased caution,” according to Associated Press.