Bishop Nestor Desire Nongo-Aziagbia said the LRA, led by self-declared prophet Joseph Kony, has become one of the biggest threats to peace in his country and in neighbouring Democratic Republic of Congo and South Sudan.

“They continue to enslave villagers, making them load carriers and sex slaves,” he said. “They are also burning down villages.”

The reappearance comes as the International Criminal Court based at The Hague opens pretrial hearings for Dominic Ongwen, former child soldier and a rebel commander. Ongwen faces up to 70 counts of war crimes and crimes against humanity in the trial that started on Jan. 21. The charges stem from LRA actions in northern Uganda, where the guerrilla group originated in 1986. Some see Ongwen as a victim of circumstance since he was abducted by LRA at the age of 10.

For more than 20 years, the rebel force abducted and turned children into child soldiers and sex slaves, while murdering, mutilating and abducting villagers.

“This (resurgence) is of great concern to us,” said Sheikh Musa Khalil, the vice chair of the Acholi Religious Leaders Peace Initiative, a peace-building organization in northern Uganda. “The group is still holding our children who it abducted. A resurgence complicates their return.”

Around 2002, the Uganda army drove out the LRA and the group is now scattered across the Central African Republic, Democratic Republic of Congo and South Sudan. Ugandan commandos backed by U.S. special operations forces are hunting down Kony but have not been able to arrest him.

“We are concerned there’s no political will to defeat the rebels,” said Nongo-Aziagbia.

Civil society groups, such as Invisible Children and The Resolve, nongovernmental organizations that track LRA activities, say there are large-scale attacks by the LRA in the remote gold and diamond mining towns in northern CAR.

On Jan. 21, the rebels attacked a Catholic mission in the Bangassou Diocese and beat up Latin American nuns before stealing food, money and medicines.