The US Embassy in Saudi Arabia has cautioned the American citizens in the kingdom, following reports of a foiled attack in the port city of Jeddah.
On Saturday, several unconfirmed reports said that Saudi security forces had thwarted an attack outside King Salman’s Al Salam Palace, which left the assailant and two royal guards dead.
The Saudi government has not officially confirmed the incident.
“Due to the possibility of ongoing police activity, American citizens are advised to exercise caution when travelling through the area,” the US embassy said.
The Al Salam Palace is one of the key royal palaces in the kingdom where the Saudi Council of Ministers convenes its meetings.
Terrorist groups such as al-Qaeda and Daesh have conducted several attacks in Saudi Arabia, mainly in the country’s Shia-dominated Eastern province.
In June, Saudi authorities said they foiled a Daesh attack on the Grand Mosque in the Muslim holy city of Mecca.
Hundreds of Saudi citizens have travelled to Syria to Join Daesh.