Observers said Ugandan troops, numbers still unclear, briefly entered the Central Equatoria region of South Sudan last week in violation of a UN arms embargo.
For his part, Ugandan military spokesperson Richard Karemire told the Associated Press that Ugandan troops entered to protect engineers working on the Kaya-Yei road, explaining that Uganda sometimes intervened for separate reasons without the authorisation of the UN Security Council, stressing that South Sudan's government is aware of this.
Deputy spokesperson for the South Sudan Army, Santo Domic Chol, denied any knowledge of the Ugandan troops’ presence inside the country.
Alan Boswell, an analyst with the International Crisis Group, said there were signs of an "imminent" government attack in Central Equatoria on groups still outside the peace deal signed by the government last September with rebel leader Riek Machar.
The National Salvation Front, which did not sign the accord, accused the government on Monday January 21st of attacking its forces outside Yei over the weekend.
Despite the agreement, the fighting continues, humanitarian assistance fails to reach those in need, and civilians continue to suffer.