Militants have launched multiple attacks in restive Borno state since Wednesday, with people attending evening prayers during the holy month of Ramadan gunned down, women shot at home, and men dragged from their homes in the dead of night.
A young female suicide bomber also killed 12 worshippers when she blew herself up in a mosque in Borno and while there was no immediate claim of responsibility, Boko Haram has used both men and young women and girls as human bombs in the past.
The wave of attacks, which took place over less than 36 hours, is the bloodiest since Buhari came to power in May, vowing to root out the insurgency that has claimed more than 15,000 lives.
News of the violence first emerged on Thursday, when survivors described raids on three different villages in Borno the previous evening that left at least 145 people killed and houses burnt to the ground.
Also Read
Today, fresh details of these killings emerged from a resident of Kukawa, the worst-affected village.
"Some residents who hid in trees saw them planting the mines and alerted us when we returned to the village and started burying our dead," he said.
"So many dead bodies are still in Kukawa lying unattended. We had to abandon them because we could not carry them with us."
Less than 24 hours later, a girl blew herself up in a mosque in Malari village, more than 150 kilometres away from Wednesday's attacks.
"People asked her to leave because she had no business there and they were not comfortable with her in view of the spate of suicide attacks by female Boko Haram members.
"She made to leave but while the people were inside the mosque for the prayers she ran from a distance into the mosque and blew herself up," he added - an account corroborated by resident Gajimi Mala.