"We lost a DPO (Divisional Police Officer) and 19 civilians in his area of jurisdiction when they came under attack by Fulani herdsmen in Girei district," police spokesman Othman Abubakar told AFP.
The senior police officer with his team were "responding to a distress call from the communities under attack to restore calm following an invasion by the armed herdsmen", he said.
Local media reports gave a much higher death toll of 30 including the police officer following the raids yesterday morning.
The villages are in Girei municipality, less than 20 kilometres (12 miles) from state capital Yola.