TEHRAN (FNA)- At least two US evacuation flights from South Sudan have been fired on, causing some injuries, said reports from Uganda, where the planes landed.
The US military aircraft were heading to Bor, the capital of the state of Jonglei and scene of some of the nation's worst violence over the last week, Voice of Russia reported.
One of the wounded service members was reported to be in critical condition. Officials said after the aircraft took incoming fire, they turned around and headed to Kampala, Uganda. From there the service members flew on to Nairobi, Kenya for medical treatment.
South Sudan has been in turmoil since President Salva Kiir accused Machar a week ago of attempting a coup.
At least 500 people have been killed in clashes.
The Sudanese army is trying to retake Bor, the capital of Eastern Jonglei state, one of the most volatile regions in South Sudan.
Troops backed by helicopter gunships were advancing on the town, army spokesman Philip Aguer told the French AFP news agency.