Remember these guys? They are still running rampant despite the #bringbackourgirls campaign.

Boko Haram militants have attacked a rural market in the north-east Nigerian town of Mainok, killing dozens of people, officials and witnesses say.

Gunmen shot at traders and customers as they raided the busy market for food supplies on Friday.

The number of casualties is not yet clear, with some reports suggesting as many as 30 people were killed.

Boko Haram has taken control of a series of towns and villages in north-eastern Nigeria in recent weeks.