Two soldiers from Cameroon have been killed and at least two others wounded in an attack by Boko Haram fighters near the Nigerian border, security sources told AFP on Monday.

Speaking on condition of anonymity, one Cameroonian military officer said two troops were killed, and an officer and a soldier injured in a clash on Saturday with the Islamists.

Spent bullets crunch underfoot, a raided bank lies in ruins and burned out cars and motorbikes dot the streets.

Michika may now be free from Boko Haram but the town in the remote north of Nigeria's Adamawa state is eerily quiet and signs of the militants' presence are everywhere.

Long tailbacks form at a bridge on the border between Chad and Cameroon while Chadian security forces, wary of deadly Boko Haram jihadists, screen all road users and their property.

"We're looking for weapons," a police officer explains at the Ngueuli bridge on the main road for imports to landlocked Chad, linking the capital N'Djamena to the far north of Cameroon.

Suspected Boko Haram insurgents have forced hundreds of soldiers to flee Marte, a border town along the shores of the Lake Chad, a local official and witnesses said Friday. 

"The terrorists, numbering over 2,000, appeared from various directions on Thursday and engaged the soldiers in Kirenowa town and adjoining communities in Marte," said Imamu Habeeb, a local community leader.

Nineteen people were killed in Thursday night's attack on a Cameroonian village by Nigeria-based Boko Haram militants, a security source said in an updated toll, adding that most of the victims were beheaded.

"The final toll from this attack is 19 dead, with a majority of the victims decapitated," a security source said Saturday on condition of anonymity.

Islamist fighters from Nigeria's Boko Haram group have killed at least 10 civilians in a cross-border raid on a village in northern Cameroon, security sources told AFP on Friday.

"Boko Haram attacked the village of Bia overnight" Thursday to Friday, one source said, on condition of anonymity. "The toll is 10 civilians killed and a large number of livestock stolen."

Seven civilians were killed in an attack in Chad blamed on Nigerian Boko Haram rebels, officials said Monday.

The Islamist militants ambushed people on their way to a market in Tchoukou Telia near Lake Chad on Friday, Dimouya Souapebe, the deputy prefect of Baga Sola told Agence France Presse.

Central and west African leaders will hold a summit next week to fine tune their campaign to crush Boko Haram, who appear to be losing ground in the face of a regional military offensive.

The April 8 talks will be the first since Nigeria's election a week ago which was won by Muhammadu Buhari, a former military leader who has vowed to rid his country of the "terror" the Islamist militants have sown.

At least four people were killed Saturday when suspected Boko Haram fighters raided a local market in a village near the northeast Nigerian city of Maiduguri, security sources said.

Scores of Boko Haram gunmen stormed Kayamla village, 20 kilometers (12.5 miles) from Maiduguri, capital of restive Borno state, and opened fire on a weekly market, killing four traders, a senior security official in Maiduguri told Agence France Presse.

The United Nations Human Rights Council will hold a special session next week on abuses by Boko Haram militants in Nigeria and neighboring countries, the council president said Friday.

The rights council rarely convenes special sessions, with only 22 held since the body was created in 2006.