The State Department issued a travel warning for Saudi Arabia on Tuesday, citing ongoing security threats.
"The last major terrorist attack against foreign nationals occurred in 2007, but security threats are ongoing and terrorist groups, some affiliated with al-Qaida, may target both Saudi and Western interests," the statement read.
Officials warned of areas such as hotels, shopping areas, and other locations that people visit when traveling to Saudi Arabia. They also added that U.S. government personnel are prohibited from going to Awamiyah, where two German Embassy officials were attacked in January, as well as other parts of the country.
"The rugged border area dividing Yemen and Saudi Arabia remains porous and is not clearly defined. U.S. government personnel are restricted from traveling within 50 miles of the border, which includes the cities of Jizan and Najran, without permission from Embassy security officials," the statement added. "Visitors who choose to travel to these areas despite U.S. government concern should be aware that terrorist and criminal elements may be operating there, including al-Qaida in the Arabian Peninsula (AQAP)."
Last month, Taiwan also issued a "yellow" travel alert for Saudi Arabia due to similar concerns.