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.

Security sources had previously said 10 civilians were killed in the cross-border raid on the village of Bia in Cameroon's Far North region.