ISWAP insurgents on Thursday invaded the International Rescue Committee office in Monguno LGA of Borno State, Northeast Nigeria.
Sources say the attack occurred around 11pm. There was however no reports of casualties and abduction during the scene but it is believed that the assailants would strike in coming days.
This is coming at a time when ISWAP and Boko Haram insurgents clashed in Lake Chad resulting in the death of 18 ISWAP fighters and three fighters of Boko Haram in Borno State.
It was gathered that the ISWAP terrorists on five guntrucks and motorcycles attacked Boko Haram acclaimed Chaliphate in Gazuwa village on Thursday, June 30.
The caliphate formerly known as Gabchari, Mantari and Mallum Masari, is located about nine kilometres from Bama local government area of the State.
The incident set to a bloody gunfight between the terrorist organisations that lasted for almost three hours.
Later, the Boko Haram faction defeated ISWAP, killed 18 of them, and took back three of their trucks as more terrorists pursued them on motorbikes and two additional trucks.
Meanwhile, the Nigerian Army on Wednesday said 314 suspected members of Boko Haram and the Islamic State West Africa Province have surrendered.
They were said to have surrendered to troops in Bama Local Government Area of Borno State as a result of the ongoing offensive onslaught against terrorism in the North East.