MAIDUGURI, Nigeria (Reuters) - Heavy gunfire was heard coming from the outskirts of Maiduguri in the northeast of Nigeria on Friday evening and a military source said Islamist insurgents were battling with security forces.
"The insurgents are trying to attack the community and the military are fighting back," the military source told Reuters.
It was not immediately clear exactly where the shooting was coming from nor how far it was from the center of Maiduguri, the capital of Borno state and the army command center for the fight against Nigeria's Boko Haram insurgents.
A Reuters witness in the city said the shooting subsided after about half an hour.
Boko Haram has stepped up attacks this week on civilians in Borno state, which is its main stronghold, killing more than 150 people in raids and suicide bombings since Tuesday.
(Reporting by Lanre Ola; Editing by David Clarke and Gareth Jones)