At least 15 soldiers and civilian security volunteers were reported killed when a patrol struck a landmine and came under gunfire near Gamboru Ngala in Borno State on Saturday, 17 October.
Two soldiers told Reuters that the dead included 10 troops and five Civilian Joint Task Force members. Six wounded soldiers were taken to Maimalari Military Hospital in Maiduguri.
The soldiers said a pickup detonated the explosive before gunmen attacked another vehicle. Military spokesperson Captain Mohammed Goni declined comment. The casualty figures remain independently unconfirmed.
A separate account placed the explosion at Kinuba village, about 25 kilometres from Gamboru. Defence sources interviewed by AFP said eight soldiers died when their patrol vehicle passed over an explosive while inspecting civilian volunteers clearing vegetation beside the road.
That account was also supported by Ibrahim Liman, a civilian militia member assisting security forces. He said a volunteer supervising the clearing work suffered shrapnel injuries.
The AFP account identified the suspected attackers as Islamic State West Africa Province fighters. The soldiers quoted in the later report suspected Boko Haram. Neither attribution has been established by a publicly confirmed finding.
The two accounts also differ in their description of the immediate operation and the number of casualties. The eight deaths described in the earlier account should therefore not be added to the later reported toll of 15.
The explosion occurred while army chief Lieutenant General Waidi Shaibu was visiting Maiduguri following an earlier attack on a military base, according to the AFP account. That base assault was a separate incident.
Boko Haram and its breakaway faction, Islamic State West Africa Province, operate in north-eastern Nigeria and the wider Lake Chad region. The conflict began in 2009 and has extended into neighbouring Cameroon, Chad and Niger.
The Civilian Joint Task Force emerged in 2013 as residents organised to protect their communities and assist Nigerian security forces against Boko Haram. UNICEF records that the organisation subsequently expanded across the north-east.
Its members are civilian volunteers rather than regular army personnel. The five volunteers included in the reported Gamboru Ngala toll were therefore listed separately from the 10 soldiers.
The attack comes amid continuing displacement across the Lake Chad Basin. In a warning issued earlier this year, the United Nations refugee agency said renewed violence was forcing people from their homes across Nigeria, Niger, Cameroon and Chad.
UNHCR reported that more than 77,500 people had been newly displaced across the four countries since January 2026 at the time of that assessment. They included over 16,000 refugees who fled attacks in north-eastern Nigeria and crossed into Niger’s Diffa region.
The agency said its teams and partners were registering arrivals, identifying urgent needs, monitoring protection risks and providing emergency assistance. Those regional figures predate the latest Gamboru Ngala incident and do not represent people displaced by Saturday’s attack.
Separately, the International Organization for Migration’s April 2026 Lake Chad Basin dashboard recorded more than 3.3 million internally displaced people across the four affected countries, alongside more than 2.7 million returnees and over half a million refugees.
The six soldiers reported wounded in Saturday’s convoy attack were receiving treatment in Maiduguri, according to the military sources.
