The gunmen also killed a police officer during the attack.
The police in Kebbi confirmed the attack to journalists.
In a similar development, Four Chinese railway workers working on the Lagos-Ibadan railway have been kidnapped.
Eyewitnesses said the gunmen were dressed in black kaftan when they stormed the site of the rail project around Kila, a village between Ogun and Oyo states and killed the policeman attached to them while struggling to abduct the Chinese workers.
They were reported to have laid an ambush in the surrounding forest for the expatriates.
