Three military personnel were wounded when the incoming fire hit two U. S. aircraft flying to a rebel-held town in South Sudan, the Ugandan military disclosed on Saturday.
The aircraft turned to the Ugandan capital Kampala after shot at on its route to the town of Bor. The wounded personnel were taken to Nairobi, Kenya for treatment.
The U. S. aircraft were sent on a rescue mission in South Sudan's Jonglei state, when they took the gunfire.
The government of Africa's newest state held the rebel responsible for the shooting, saying the town was under the control of the renegade soldiers.
On Friday, the U.N. Security Council warned that the ongoing conflict caused by a leadership feud could spill over to neighboring countries.
Kenya on Saturday said it would send troops to South Sudan to evacuate its 1,600 citizens.