The girls had been kidnapped by the militant group a month ago.
The country's president called the incident a "national disaster."
The blast bears the hallmarks of a faction led by the group Abubakar Shekau, which forces women and girls to carry out suicide bombings.
The Islamist militant group has killed more than 380 civilians in Nigeria and Cameroon since April.
Joy Bishara and Lydia Pogu detailed the horrors they faced when they were kidnapped.
The attack on Nigeria’s northeastern city of Maiduguri on Wednesday night killed at least 14 people.
The girls were among more than 200 kidnapped in April 2014.
As part of News Deeply’s “Women and Jihad” series, we look at how escape from Boko Haram doesn’t always mean the end of the
“If you don’t provide the proper food, the child that is malnourished today and treated might be severely malnourished again
Since it began its military campaign against the Nigerian government in 2009, the Islamist terrorist group Boko Haram has
Trump will not run the US alone. As has always been the case, American presidents must negotiate policies with Congress. African
The airstrike was meant to target Boko Haram militants.
Robert Smith has also promised to help girls who may be set free in the future.