尼日利亚博科圣地组织占领重镇巴马
Nigeria's militant Islamist group Boko Haram has seized the key north-eastern town of Bama after fierce fighting with government forces, residents say.
尼日利亚激进伊斯兰组织博科圣地在与政府武装进行激烈的战斗之后占领了东北部重镇巴马。
Thousands of civilians have fled the town, along with soldiers, they added.
The military has not yet officially commented on the claim that it has lost control of Bama, the second biggest town in Borno state.
Last month, Boko Haram said it had established an Islamic state in areas it controls in north-eastern Nigeria.
If confirmed, the capture of Bama would be an extremely significant development and would raise concerns that Boko Haram's next target will be Maiduguri, the state capital about 70km (45 miles) away, says BBC Hausa service editor Mansur Liman in the capital, Abuja.
It would be the biggest town under Boko Haram control.
Residents told BBC Hausa that Boko Haram captured Bama after heavy fighting on Sunday and Monday.
The military had initially repelled Boko Haram's assault, but the group returned with reinforcements to seize the town, the residents said.
The militants, who travelled in armoured trucks, first took control of the military barracks, they added.
Soldiers and residents fled on foot, many of them walking all the way to Maiduguri, residents told the BBC.