"Five employees of a Nigerien company had their throats slit yesterday (Thursday) evening in Dagaya, a village near Bosso," Mayor of Bosso Bako Mamadou told AFP.
The victims were a driver, a carpenter and three construction workers who were working at a site in Dagaya, according to local radio.
"We do not know the circumstances of the attack," Mamadou said, adding that security measures had been put in place.
Local officials say they believe that the militants targeted the five workers, who were from the city of Diffa, which is located in the heartland of the Boko Haram insurgency.
Troops from Niger, Chad, Nigeria and Cameroon have been fighting Boko Haram insurgents for several months and have claimed a string of successes.
But a recent surge in an attacks has left analysts suggesting a decline in the intensity of operations has allowed the rebels to regroup and rearm.
