At around 9 am (0800 GMT) on Sunday, shelling could be heard and military helicopters were circling the city.
The acknowledgment from the leader of Nigeria’s Islamic extremists comes in a video posted on YouTube
Witnesses said the blast went off in the packed market neighbourhood of Kasuwar Arawa.
A Nigerian security source said the bomb went off at 12:15 p.m.
“No one could attend to the corpses and even the seriously injured ones may have died by now,” officials said.
The woman, who was wearing a hijab, was killed instantly, witnesses said.
She says she told her captors she did not want to be a suicide bomber but allowed them to strap her into a vest primed with explosives.
Locals were still counting those abducted in Sunday’s attack in the remote area but that the figure could pass 100.
With Nigeria Ebola-free which killed 6583 people, inflow of patients from Nigeria to Pune city resumed.
The blasts occurred as store owners were shutting their shops and Muslims were preparing for evening prayers.
The attack was the third jailbreak in the past two months in the West African nation.
The leader of a vigilante fighter group in Nigeria says Boko Haram militants have killed about 45 people.
Islamic extremists in Nigeria have seized Chibok, forcing thousands of people to flee the town.
Nigeria’s ambassador to US has berated Washington for refusing to sell weapons to fight country’s Islamic uprising.
Islamic extremists overran a major northeastern town that is home to Nigeria’s defense chief on Wednesday.
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