IPOB said the killing of Achi was an affront to Igbo people.
Achi was burnt to death by Fulani herders in Kafin Koro Community, Paikoro Local Government Area of Niger State.
The herders, who stormed the residence of the Catholic priest at about 1am on Sunday, shot sporadically.
It was reported that the Fulani terrorists burnt down the building where Achi hid when they couldn’t gain access to abduct him.
However, IPOB warned that the killing of Christians and Igbos in the North must stop.
A statement by Powerful reads: “The Movement and the family of the Indigenous People of Biafra, under the leadership of Nnamdi Kanu, condemn the barbaric murder of an Igbo Catholic Priest by Fulani terrorists in the Northern part of Nigeria.
“The burning alive of Igbo Catholic Priest in Niger State by Fulani terrorists is not only barbaric but also an affront to Igbo Nation and Christian Association of Nigeria. Fulani terrorists have been killing Ndigbo in the North at any opportunity, and this must not continue.”
IPOB stressed that the killing of Christians pointed to the alleged agenda to forcefully Islamize and Fulanize Nigeria.