Boko Haram insurgents attacked the outskirts of Maiduguri in northeast Nigeria on Sunday, security sources said, their second assault in a week on a city they hope to make the capital of a breakaway Islamist state.
At least eight people were killed as the militants clashed with soldiers, witnesses and a hospital source said, but the military later said the attack had been repelled.
"There is heavy gunfire going on. Everybody is panicking and trying to flee the area," Idris Abubakar, a resident of Polo suburb on the southwestern outskirts of the city, said.
The insurgents, who arrived in several armed pick-up trucks and on motorbikes, attacked three places in the south of Maiduguri at around the same time, a security source said.
Resident Babagana Lawan said a grenade fell on his house, killing his brother and two factory workers living with him.
In a separate incident in the town of Potiskum, 230 km (140 miles) west of Maiduguri, a suicide bomber blew himself up outside the house of federal legislator Sabo Garbu, killing 10 people, according to security sources.