Several number of soldiers have been killed and many others declared missing after an ambush by militants from the Islamic State-backed faction of Boko Haram, the Islamic State West Africa Province (ISWAP), formerly known as Jamā'at Ahl as-Sunnah lid-Da'wah wa'l-Jihād in Borno State.

the attack took place in Monguno on Thursday.
Monguno is over 100km north of Maiduguri, the state capital and hosts thousands of Internally Displaced Persons, mostly from Dikwa and Marte council areas.

“We lost so many soldiers during the attack that lasted for many hours. May their souls rest in peace,” a military source told SaharaReporters.

The source added that military vehicle, several weapons and ammunition were stolen during the attack.

The Nigerian military has repeatedly claimed that the insurgency has been largely defeated and frequently underplays any losses.

SaharaReporters gathered that the soldiers were on patrol to clear some Boko Haram elements in the area following credible intelligence when they were ambushed by the group.

http://saharareporters.com/2021/09/16/exclusive-many-nigerian-soldiers-killed-fresh-boko-haram-ambush-borno

Ok

I thought almost all the terrorists have willingly surrendered?