Dozens of residents in northeastern Nigeria have been killed in two separate attacks launched by Boko Haram Islamists, according to officials and residents.

Scored of Islamist insurgents dressed in military uniforms stormed the Christian farming village of Izghe, in Borno state, late Saturday and opened sporadic fire on residents, killing at least 106 people in an attack specifically targeted at male residents.

The gunmen, who arrived in the village riding in trucks and on several motorcycles, opened fire and hacked male residents they had assembled in the village square. They moved door to door in search of male residents who were hiding.

The attack prompted an exodus of hundreds of panic-stricken residents of nearby villages to the neighboring Madagali district in Adamawa state.

"We suspect that the gunmen were members of Boko Haram. They have taken over the village," said Madagali local government chairman, Maina Ularamu..

The attackers looted businesses and food stores "and loaded all their spoils into vehicles owned by residents and fled into the bush," said Ularamu.

A survivor of the attack, farmer Barnabas Idi, said he scaled the fence of his house and crawled for about 40 minutes to safety. Idi said that security agents were not present during the attack.

In the second attack early Saturday, suspected Boko Haram gunmen opened fire on Doron Baga, a fishing village along Lake Chad.

"They opened fire from all directions, forcing residents to jump into the lake in a bid to escape, and many drowned while others were gunned down," said Babagana Gwoni, a survivor of the attack.

The gunmen looted fish and foodstuffs before setting houses on fire, Gwoni said.

Lt. Col. Mohammed Dole, a military spokesman, confirmed the Doron Baga attack but declined to give details.

"We received report of the attack on Doron Baga, but we don't have details because the area falls under the operational jurisdiction of the Multinational Joint Task Force," Dole said.

The Multinational Joint task Force comprises troops from Nigeria, Niger and Chad and was set up in 1998 primarily to fight light weapons proliferation. Its mandate has been expanded to include combating the Boko Haram insurgency.