Sadiq-Bello disclosed this on Friday in Lafia, while fielding questions from newsmen.
But he did not disclose the name or rank of the officer who was serving at the Obi Division of the command.
He said the police patrol team was ambushed along Obi-Agwatashi road about two weeks ago.
He said the Police would arrest the killers and prosecute them.
The commissioner described the incident as unfortunate and part of the hazards policemen encountered in the line of duty.
He condoled the family of the deceased officer and prayed God to grant them the fortitude to bear the loss.
He appealed to members of the public to continually support the efforts of the police in order to curb crime and criminality in the state.