The Pentagon said that 20 Americans were evacuated from Juba to Entebbe in Uganda Friday and that two C-130 aircraft are "standing by for any further requests from the State Department" for help in South Sudan.
The United States and several European countries evacuated scores of their citizens from South Sudan in the days immediately following the outbreak of violence.
U.S. Ambassador to South Sudan Susan Page is still in Juba and will maintain "constant communication" with South Sudanese officials, UNMISS and her foreign counterparts, the State Department said in a statement.
The U.S. Embassy in Nairobi will provide consular services for U.S. citizens who choose to stay in South Sudan while the embassy in Juba is closed. The statement did not say how long that would be.
U.S. Announces More Aid for South Sudan
Even as the United States drew down its embassy staffing in Juba, Washington announced a new injection of nearly $50 million in aid to help address the humanitarian crisis in South Sudan, where U.N. officials have said the numbers of displaced persons could leap to 400,000 if a peace deal is not reached in Ethiopia.
The monies "will for all intents and purposes be available immediately to our partners" on the ground in South Sudan, U.S. Deputy Assistant Secretary of State Elizabeth Hopkins told VOA News.
U.S. Special Envoy to Sudan and South Sudan, Donald Booth, was in Addis Ababa Friday for the start of the peace talks, she said.
He and Secretary of State John Kerry "continue to urge President Kiir and former Vice President Machar to reach an immediate cessation of hostilities, most importantly allow full and unfettered humanitarian access, and to work to resolve their differences peaceful and democratically," Hopkins said.
"We remain very committed to peace and stability in South Sudan," she said.
The United Nations said that aid agencies in South Sudan are scaling up their work, especially in towns that have been struck by violence and in rural sites where civilians have sought safety.
"The largest site of civilians was in Awerial, Lakes State, where up to 76,000 people have gathered," Jens Laerke of the U.N. Office for the Coordination of Humanitarian Affairs (OCHA), told reporters in Geneva on Friday.
Laerke said aid agencies are providing food, non-food items and basic healthcare in Awerial, and are stepping up efforts to make clean water and latrines available.