Two female suicide bombers, suspected of belonging to militant group Boko Haram have killed three Nigerians in a truck full of refugees in a town in Cameroon’s far north region, a local government source, said.

Military sources had said earlier that they suspected the bombers’ target was a nearby mosque in Fotokol.

The first bomb went off during a security check and it was unclear if the second bomber had detonated her bomb or whether she had been killed first by Cameroonian forces.

Boko Haram insurgents had waged a six-year campaign of violence, killing thousands of people and displacing many from their communities in north eastern part of Nigeria.

Neighbouring countries, including Cameroon, joined forces against the group in 2014, as its offensive spread beyond Nigeria’s borders.