Kaduna police, in its statement, said it has taken cognizance of the murders and launched an operation to crackdown on the armed bandits involved in the crime.
The attack occurred on Saturday at Gwaska village in Birnin Gwari, Kaduna State, a police spokesman said.
"The 45 bodies were found scattered in the bush".
The vigilante said the bandits struck at about 2:30 pm (1330 GMT) on Saturday and stayed for three hours before retreating to their base in the forest in Zamfara.
Efforts to get the reaction of the state police command were futile as the Command Public Relations Officer, Aliyu Mukhtar, could not be reached on the phone.
Survivors mostly women now at Doka district said "most of those killed were volunteers that tried to defend the village and children that could not escape the onslaught".
He said that the policemen were detailed to comb the area for the killers and other criminals.
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"The bandits, after sacking the entire village of about 3,000 people, razed their houses", the source said.
In a statement by his Senior Special Assistant on Media and Publicity, Samuel Aruwan, El-Rufai commiserated with Birnin Gwari Emirate over the "fatal" attack.
"They burnt down many homes", he said.
"My thoughts and prayers are with the families of the victims and the people of Birnin Gwari".
Meanwhile, Nasir el-Rufai, the state governor, has expressed concern over the continuous attacks in the state. It also assured that the military will be stationing a permanent Army battalion in Birnin Gwari to contain the situation.
In addition, he revealed that the battalion of Army has been sent to the area to forestall further attack.