More than 30 people have been left dead after two bomb blasts occurred in Gombe on Thursday.
The figure of the dead was given by an anonymous Red Cross official.
“I have 30 bodies in bags and I am sure there are more out there,” the official said.
The blasts occurred at a market where people were shopping in anticipation of Friday’s Eid.
“I was about 70 metres (yards) from the scene” when the first blast struck, Badamasi Amin, a local trader, told AFP.
“I and many other people rushed to assist the victims. While we were trying to attend to the wounded, another blast happened outside a china shop just opposite the footwear shop.
“Several people were killed and many more were injured,” he added.
Ali Nasiru, another trader, said he saw “people lying lifeless on the ground”.
“Traders and shoppers helped in evacuating the victims to the hospital,” he said. “I can’t say how many people were affected but there are many.”
The group has killed hundreds since President Muhammad Buhari’s inauguration in May, with people calling for him to fight them with a stronger hand.