The Ugandan authorities say they have arrested three people in connection with an attack on a school on Friday in which about 40 people were killed.
Most of the victims were students at the Lhubiria school in the western town of Mpondwe.
Many were burnt to death in their dormitory.
District Commissioner Joe Walusimbi said the arrests followed tip-offs from local residents.
But he added that the Ugandan army was still hunting for the Islamist militants who have been blamed for the attack and reportedly fled into the Democratic Republic of Congo.