Suspected Boko Haram militants have killed dozens of villagers in fresh attacks in Borno state in north-eastern Nigeria, the BBC has learnt.
In one attack, gunmen disguised as soldiers fired on a crowd in a church compound, local MP Peter Biye said.
He said he had warned the army that the area was at risk after troops stationed nearby were withdrawn three months ago.
The latest attacks come as the army denied that several generals had been found guilty of aiding the militants.
Nigerian media reported on Tuesday that 10 generals and five other senior military officers had been tried before a court martial for supplying arms and information to the Islamist militant group.
However, a military spokesman called the reports "falsehoods".
This contradicted Interior Minister Abba Moro who in a BBC interview on Tuesday said it was "good news" that the army had identified soldiers who were undermining the fight against the insurgents, and that it sent a strong message to other serving officers.
Boko Haram has waged an increasingly bloody insurgency since 2009 in an attempt to create an Islamic state in Nigeria.
The BBC's Will Ross in Nigeria says the attacks on six villages over the last few days have been near the Mandara Mountains - a known Boko Haram hideout by the border with Cameroon.
Residents who managed to flee Attagara said that their village church first came under attack on Sunday when reportedly 20 people died.
Villagers retaliated and some militants were allegedly killed.
This seemed to prompt a revenge attack on Tuesday when militants dressed as soldiers pretended they had come to protect the village, Mr Biye said.