The State Department on Saturday ordered the departure of all family members and non-essential U.S. government personnel from posts in Sudan and Tunisia and is issuing travel warnings to American citizens in the two countries due to security concerns over anti-American violence.

“Given the security situation in Tunis and Khartoum, the State Department has ordered the departure of all family members and non-emergency personnel from both posts, and issued parallel travel warnings to American citizens,” said Victoria Nuland, a department spokeswoman.

The department’s travel warning said while Sudan’s government has taken steps to limit the activities of terrorist groups, some remain there and have threatened to attack Western interests. The terrorist threat level remains critical throughout Sudan, the department said.

The State Department said the airport in Tunis was open and it encouraged all U.S. citizens to depart by commercial air. It said Americans in Tunisia should use extreme caution and avoid demonstrations.