Boko Haram have launched frequent attacks near Cameroon's border with Nigeria.
Cameroon's Far North region has become a target for Boko Haram militants.
The attack bears the hallmarks of Boko Haram, which has stepped up attacks in Cameroon.
The U.S. has also authorized the deployment of 300 troops to Cameroon to fight the insurgents
Too often the default has been to shoot first and ask questions later, says John Campbell.
The group has carried out attacks across the borders of neighboring countries.
Soldiers also seized black-and-white flags associated with the Islamic State militant group.
The Nigerian militant group has launched frequent attacks in Cameroon, Chad and Niger.
Approximately 90 U.S. military personnel have already arrived in Cameroon, the White House says.
The Nigerian army have entered Sambisa Forest, thought to be Boko Haram's last stronghold.
Warplanes lead offensive into Sambisa forest, 100 km from village where Boko Haram abducted 200 girls last year.
More than 1.2 million people have been displaced within Nigeria and almost 200,000 have fled.
Despite recent defeats, experts have warned that the terror group still pose a significant threat.
South African and former Soviet Union mercenaries training and advising military for pre-election offensive.
Two hundred vehicles transporting troops have entered northeastern Nigeria to take on the Islamist militants.
Jihadists attempt to sneak out of Baga town wearing women's clothes as the military campaign escalates.
Neighboring countries plagued by cross border attacks are weighing in against the insurgent group.
Niger's parliament approves the deployment of more than 3,000 troops to tackle Boko Haram in northern Nigeria.
French reconnaissance flights are beingconducted along Nigerien and Chadian borders as part of wider Sahel strategy.
The kidnappings are among the largest abductions on Cameroonian soil since last year.
Nigeria's military has reportedly agreed a truce with Boko Haram, in a deal that may also see the release of 200 schoolgirls taken hostage by the Islamist group
Boko Haram has killed thousands over the past five years in its struggle for an Islamic state in northeast Nigeria.
Fighters from the group have taken over northeast towns and villages in recent weeks