The U.S. Embassy in Qatar warned American citizens to "shelter in place until further notice." The embassy said in its June 23 alert that it was acting "out of an abundance of caution" but gave no other details. Qatar is home to the Al Udeid Air Base, the largest U.S. air base in the Middle East.

The U.S. embassy in Qatar emailed U.S. citizens in the Gulf country on Monday recommending that they shelter in place until further notice, triggering a slew of messages from various Doha-based institutions to employees and students while Qatar maintained that the situation was stable.

The United States Embassy in Qatar has issued a warning to Americans to “shelter in place” as tensions in the region continue to escalate. “Out of an abundance of caution, we recommend American citizens shelter in place until further notice,