Uganda's President Yoweri Museveni has ordered more troops to western Uganda where attackers from a group with links to the IS terror group killed at least 37 school students.
Members of the rebel Allied Democratic Forces (ADF) killed the students late on Friday at Lhubirira Secondary School in Mpondwe, near the border with the Democratic Republic of Congo.
Military and police said the attackers had also abducted six students and fled towards the Virunga National Park across the border. Their fate is unknown.
Museveni said more soldiers had joined the pursuit in the area, which includes Rwenzori Mountain, from where the ADF launched their insurgency against Museveni in the 1990s.
"We are now sending more troops into the area south of Rwenzori Mountain," he said in a statement.
"Their action, the desperate, cowardly, terrorist action, therefore, will not save them. We are bringing new forces to the Uganda side as we continue the hunting on the Congo side."
On Saturday, privately owned NTV Uganda television said the death toll stood at 41, while the state-run New Vision newspaper said it was 42. New Vision said 39 of the dead were students, and some were killed when the attackers set off a bomb as they fled.
The attack drew widespread international condemnation including from the United Nations, the African Union and East African's Intergovernmental Authority on Development. Ugandans were shocked by the attack.
"Parents across the country, please do not panic, our children are safe, and they will remain safe. They are evil people and they are trying to harm our children, but they will not manage," Janet Museveni, the First Lady and Education Minister, said late on Saturday.
Museveni said the government would also investigate if there were any lapses that enabled the attack to happen.
"Was an alarm sounded and by whom? How did the nearby security people respond? Why didn’t our people on the Congo side have intelligence on this splinter group etc?" Museveni asked.
The ADF was largely defeated by the Ugandan military but remnants fled into the vast jungles of eastern Congo from where they have since maintained their insurgency - attacking civilian and military targets in Congo and Uganda.


Trump cancels US strikes on Iran, citing progress in talks
US confirms third strike on Indian-crewed tankers this week
UK defence minister Healey quits, says PM Starmer's plans fail to keep country safe
False alarm at the Pentagon triggers brief shelter-in-place order
Trump says US will hit Iran 'very hard', take control of energy infrastructure
US and Iran trade attacks for a second day, undermining shaky ceasefire
Bahrain says debris from intercepted Iranian drones injures child, damages homes
Philippines launches probe into deaths of two athletes from top basketball team
