Suspected case-patients, one of them a woman who became ill while pregnant, have links to the western part of Uganda.
The newly confirmed cases are linked to a 4-year-old boy who died from his Ebola infection last week.
The death of a mother and her newborn baby are connected to a recent case and raise more concerns about undetected transmission.
The new case raises the death toll to 2 and the case count to 10 in this outbreak.
In the first of the 2 outbreaks, affected children had contact with bats. Further investigations are under way for both events.
Contact monitoring is still under way for 216 people who are at quarantine facilities located throughout the country.
No transmission has been found outside of a single chain, and eight patients in treatment are stable.
The death total remains at one, the index patient who died in late January.
Uganda last reported an Ebola outbreak in 2022.
The index patient's wife is the second confirmed case, and 3 close contacts are isolated for treatment and testing.
