"They burned over 100 houses and left with 10 vehicles belonging to our people yesterday," the farmer in Alau village said on condition of anonymity for fear of his safety.
"Several women and children were found seriously injured." The attackers, armed with guns, came in vans and on motorcycles yelling "God is great," and looted the villages' food supplies, he said.
"Those of us who heard their arrival earlier were able to escape, but several of our colleagues who were already asleep couldn't make it before the attackers caught them and shot at them," said the villager.
The village residents first buried 17 farmers, then found two more dead, said the resident of Alau, which sits south of the Borno state capital, Maiduguri.
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The attack came on the heels of similar attacks in Nigeria's border villages, where homes have been burned and civilians killed in attacks by members of the Boko Haram. Some 15 people were killed in attacks last week in the fishing village of Gashigar, forcing many residents to flee to neighboring Niger.
A security officer said that villages in remote and isolated places often fall victim to such attacks.
Last week, President Goodluck Jonathan announced a major shake-up of the high command of Nigeria's military. He fired all his service chiefs and appointed an air force officer from the troubled northeast as the top military commander.