KANO: Criminal gangs have killed a total of 31 people in three separate attacks in northwest and central Nigeria, local residents said Thursday, in the latest violence in the volatile regions.

On Wednesday, motorcycle-riding bandits stormed Damaga village in northwestern Zamfara state, killing residents and stealing livestock as villagers fled the shooting spree.

"The bandits came in around 1:00 pm (1200 GMT) and began shooting indiscriminately. They killed 13 people," Ayuba Musa told AFP.

"They took away a large number of cattle, sheep and goats. They didn't spare even chickens," he added.

The shooting forced students from a secondary school in the village to abandon their classes for fear of abduction, said another resident, Sahame Umar, who gave a similar toll.

The victims were buried late Wednesday, said Musa, who attended the funeral.

Central and northwest Nigeria are increasingly becoming hubs of criminal gangs of cattle thieves and kidnappers who raid villages, killing and abducting residents after looting and burning homes.

While the gangs are driven by financial motives and have no ideological leanings, there is growing concern they are being infiltrated by jihadists from the northeast, who have waged a rebellion for over a decade to establish an Islamic state.

Earlier Wednesday, gangs invaded Osewu village in central Nasarawa state around 0500 GMT.

"They (bandits) used machetes to attack people and killed 17, including our chief," resident Idris Habibu told AFP.

He said the attackers came in "huge numbers", leaving local vigilantes helpless.

Another resident, Abdullahi Omeiza, said the assailants had resorted to killing with machetes despite being armed with guns.

On Tuesday, criminal gangs had killed one and injured 18 others when they invaded Kapana village in central Niger state, local lawmaker Andrew Danjuma Jagaba told AFP.

Police were not immediately available to comment on the incidents.