LAGOS, Dec. 19 (Xinhua) -- Up to 22 persons were feared dead following an attack by gunmen who stormed the business place of some money changers in Mubi area of northeast Nigeria's Adamawa State, military authority and eyewitness said on Thursday.
Military commanding officer of the Special Battalion in Mubi, Lt.-Col. Beyidi Martins, told reporters that the special troops killed 12 gunmen who attacked Mubi Central Market on Wednesday.
An eyewitness also told reporters that about 20 gunmen attacked bureau de change shops in the market, killing 10 people while they stole an undisclosed amount of local and foreign currencies.
Martins said the soldiers caught up with the escaping criminals near Digil village in Mubi, where a shootout ensued, leading to the killing of the 12 insurgents.
He said some money and weapons were recovered from them.
This is the second time within the year that the market has experienced such attacks on the bureau de change section of the market.
Adamawa State, located in Nigeria's northeast region, has frequently witnessed attacks perpetrated by Boko Haram since 2009, when the militant sect launched its insurgency targeting churches, security facilities, schools and villages.
More than 2,000 people, including women and children, have been reportedly killed since the sect launched its four-year insurgency in Africa's most populous country.
A state of emergency declared by President Goodluck Jonathan subsists in Adamawa, Borno and Yobe all in the northeastern region of Nigeria.