A soldier and a local chief were killed in Boko Haram attacks in northern Adamawa state in northeast Nigeria, military and civilian sources said Sunday.

"We lost a soldier in the fight. He was one of the armoured tank drivers," said a military officer, in an account supported by residents.

Madagali is 280 kilometres (nearly 175 miles) north of the Adamawa state capital, Yola, near the border with neighbouring Borno state.

The jihadists, who came in guntrucks at about 5:00 pm (1600 GMT), were forced to retreat to their enclave in the Sambisa Forest, just across the state border in Borno.

"They (Boko Haram) killed a soldier in the fight and also killed the village chief of Gubla as they fled back to Sambisa," said community leader Maina Ularamu, a former administrative head of Madagali local government area.

Three bodies of Boko Haram fighters were recovered after the gunbattle, the two sources said.

On Friday three troops were killed in a Boko Haram raid on a military base near the Borno state capital, Maiduguri.

Last Monday, three people were killed and homes were razed when Boko Haram fighters stormed the villages of Shuwa and Kirchina, in the Madagali area.

The attacks underline the persistent threat Bono Haram poses in the region despite government and military claims the militants have been "technically defeated".

Boko Haram's decade-long insurgency has killed 27,000 people and displaced some 1.8 million in northeast Nigeria alone.

The violence has also spilled into neighbouring Niger, Chad and Cameroon, creating a dire humanitarian crisis.

Nigeria's President Muhammadu Buhari is seeking re-election next Saturday. He came to power in 2015 on a promise to defeat Boko Haram. His main opponent is Atiku Abubakar, who is from Adamawa.

(This story has not been edited by Business Standard staff and is auto-generated from a syndicated feed.)