Two female suicide bombers have blown themselves up at a crowded market in northern Nigeria's Maiduguri city, killing at least 30 people, witnesses say.
One teenage girl blew herself up first and as people gathered to help victims, the second girl detonated herself, the witnesses added.
One man told the BBC he heard loud sounds as the bombs exploded.
Militant Islamist group Boko Haram is waging an insurgency in Nigeria.
It was based in Maiduguri, the capital of Borno state, after its formation in 2002, but it has since been driven out of the city by the military and vigilante groups.
Culled from BBC News.