Boko Haram insurgents have reportedly retaken Gamboru Ngala, Borno State, where they were recently pushed out by Chadian troops.
A source said the insurgents on Thursday attacked three Borno villages, killing not less than 20 civilians near the country’s border with Cameroon.
Nigerians in the area have reportedly fled to Kusihri village in Cameroon.
Another source said the insurgents stormed Gamboru Ngala town, setting many homes ablaze while shoting indiscriminately, leading to the death of 20 persons.
A member of a youth vigilante group said: “Many people fled into Cameroon and Chad territories but I can’t tell you the casualty figure now please. ”
In a BBC Hausa Radio news broadcast, monitored in Maiduguri, it was reported that the Chadian troops said 18 people were killed and many houses razed by the insurgents.
Gamboru, Ngala and Foyi towns that were attacked are all Nigerian towns in its border with Chad.