Suicide bomb blasts rocked a camp for migrants who have fled Boko Haram insurgents near Nigeria's restive northeastern city of Maiduguri early Wednesday, officials said.

"There were four explosions inside the camp," the coordinator of the Muna camp Tijjani Lumani told AFP. "The bombers struck at different locations around 4:30 am. The explosions triggered fires which burned down many tents", he said, adding that casualties details were not known.