Two jihadist groups have for weeks been engaged in deadly clashes in their northeast Nigeria strongholds according to security sources and residents.

Boko Haram militants have been fighting government troops for almost 14 years conquering swathes of territory in a bid to establish an Islamic caliphate in the region. Since their insurgency started, the fighters caused the death of more than 40,000 people forcing 2 million to displace, according to the United Nations.

They  have also been fighting against rival jihadists from the Islamic State West Africa Province (ISWAP) group, who emerged in 2016.

Clashes initially started over ideological differences, with ISWAP -which emerge from a schism in Boko Haram- objecting to the latter’s indiscriminate killings of Muslims.