"Chadian forces on Nigerian territory are mostly in the border town of Fotokol and Gamboru Ngala on the basis of the bilateral agreement we signed," Alex Badeh, Nigeria's chief of defense staff, told reporters after signing the agreement with Chadian counterpart Brahim Mahamat.
"We have been working together ever since. They [Chadian forces] came here to clear some grey areas; that is what we have done. We have just met as an addendum to the MoU that we signed on Jan. 18," he said.
The contents of the MoU, however, were not released to the media.
"I know that Chad is bringing a force of between 2,000 and 2,500. Nigeria is taking all her forces, but to work with the Chadian forces, we have 5,000 to work with them, and that is what we have there," Badeh said.
He added: "The contribution from Cameroon, I am not very sure of that for now. The Nigerien forces, the MOU we have with Niger, they are on their own side so that Boko Haram or the enemies won't have the opportunity to run into Niger to go and cause havoc there."
On Friday, Nigeria's defense headquarters confirmed that military delegations from Nigeria and Chad had met to review "the progress of the ongoing counter-terrorism campaign being conducted in the Lake Chad Basin area."
"The forum noted with satisfaction the recent successes on the various fronts of operations and resolved on additional measures to sustain the momentum of the campaign," the defense HQ said in a statement.
Defense spokesman Chris Olukolade, for his part, said the two delegations had agreed to enhance coordination and logistical cooperation.
"The bilateral forum – where the Nigerian military delegation, led by Air Chief Marshal Alex Badeh, and the Chadian's, led by Maj. Gen. Brahim Mahamat, discussed details of the ongoing onslaught on terrorism – is a follow-up to an earlier one held last month," Olukolade said.
"The two countries are currently involved, along with others, in military operations aimed at stamping out the activities of terrorists who have constituted a menace to security in the entire region," the spokesman added.