The doctors were allegedly killed on Sunday morning.
Three foreign doctors, believed to be South Koreans, have been killed in Potiskum, Yobe State.
The three medical doctors, who were working as consultants at the General Hospital in the town, were killed in the early hours of Sunday. Some sources say they are Chinese but we are working to ascertain their nationality.
A source said they were found slaughtered in their quarters in the town.
Efforts to reach the police or the Joint Task Force overseeing security in the state were unsuccessful as at the time of this report.
The murder of the doctors is coming two days after the killing of nine polio vaccinators in Kano by unknown gunmen.