At least 20 people were killed Monday when a young female suicide bomber detonated her explosives at a bus station in Maiduguri, northeast Nigeria, in an attack likely to be blamed on Boko Haram.

At least 20 people were killed Monday when a young female suicide bomber detonated her explosives at a bus station in Maiduguri, northeast Nigeria, in an attack likely to be blamed on Boko Haram.

The blast happened near a fish market in the Baga Road area of the city, which has been repeatedly targeted in recent weeks by shelling, bombs and suicide attacks.

There were also indications of a second bombing by a girl about the same age outside the bus station but no one was hurt.

There was no immediate claim of responsibility, but Boko Haram extremists have frequently targeted civilians at markets and bus stations during their six-year insurgency.