The US state department has ordered non-essential staff from its embassies in Sudan and Tunisia to leave with their families and warned its citizens against travelling to the two countries owing to concerns over rising 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 a spokeswoman, Victoria Nuland.
In Tunisia, the warning advised Americans that the international airport in Tunis was open and encouraged all US citizens to depart on commercial flights.
It said Americans who chose to remain in Tunisia should use extreme caution and avoid demonstrations. On Friday, protesters climbed the walls into the US embassy in Tunis, torching cars, attacking the entrance building and setting fire to a gym and a neighbouring American school.