Story highlights Worshippers were gathering for prayers when blasts hit in Damaturu, Nigeria, army says

Dozens were killed and wounded in attacks in Gombe a day before, a Red Cross official says

No group has claimed responsibility; Boko Haram has carried out attacks in both places

Lagos, Nigeria (CNN) A bombing attack targeting Muslim prayer grounds in Nigeria's northeastern Yobe state killed nine people and injured 18, an army spokesman said.

An elderly woman and a 10-year-old girl carried the explosives used in the attack.

They detonated their devices at screening areas set up by security forces outside two sites where worshippers were gathering for prayers in the town of Damaturu, Col. Sani Kukasheka Usman said.

Police spokesman Gbadegesin Joshua Toyin had earlier said at least 12 people were killed in the blasts as well as the two attackers.

A day earlier, two simultaneous bombings ripped through a market in the city of Gombe, capital of neighboring Gombe state, killing at least 48 people and injuring 58 others, a Red Cross official said.

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