When asked whether the rebels would attack Ugandan army positions, Otti said: "Yes, we will."
South-Sudan mediated talks
The army, which has been fighting a bloody insurgency for 20 years, has been engaged in south Sudanese-mediated peace talks since July.
In August, leaders signed a truce, raising the hope that there would be an end to the conflict that has killed tens of thousands of people and displaced 1.7 million in north Uganda.
|"If they come back, we are in our positions and we are ready to deal with them" |
army spokesman for northern Uganda
The Ugandan army said it was ready for an LRA offensive.
Chris Magezi, army spokesman for northern Uganda, said: "If they come back, we are in our positions and we are ready to deal with them.
"We shall hit them. When peace talks started, they were a spent force. Otti knows that [war] is not the best option for him. Their best option is peace talks."
Both sides have accused each other of violating the truce, but the stop-start talks are still seen as the best chance for peace.
The LRA, which has been accused of forcibly recruiting child soldiers and targeting civilians, suggested Kenya and South Africa as alternative venues, but earlier this week Nairobi ruled out hosting negotiations.