Terrorists killed at least 12 soldiers and three civilians in coordinated overnight attacks in northeast Nigeria, military sources and residents said on Monday.

The assaults in Kukawa, Dalwa and Goniri came days after a similar attack on an army post in Ngoshe.

Boko Haram terrorists raided Kukawa district in Borno state before dawn on Monday, pushing towards the nearby military camp in a three-hour battle, soldiers involved told Reuters.

Troops later retook the camp but not before the commanding officer and five other soldiers were killed, a military source said. Karta Maina Ma'aji Lawan, the lawmaker representing Kukawa, confirmed the attack and the officer's death.

Nigeria ramps up fight against terrorists

In Dalwa, terrorists killed two soldiers and three residents before torching more than 250 homes, Shetima Isa, a resident and traditional leader, said.

In neighbouring Yobe state, terrorist overran the Goniri military base, killing four soldiers and setting vehicles and buildings ablaze, another soldier said.

Nigeria's military has ramped up raids on terrorist hideouts this year as part of a renewed offensive.

The latest attacks came just hours after military intelligence had warned of a likely terrorist attack.