Gunmen in the early hours of Sunday ambushed and killed three operatives of the Delta State Police Command.
Others in their patrol vehicle were wounded in the attack which occurred in Okpanam, near Asaba, the state capital.
The officers who were ambushed near the divisional police headquarters at about 4.40 am were said to be responding to a distress call.
According to the spokesperson for the Command, DSP Bright Edafe, the patrol team had barely driven out of the station when the gunmen opened fire on them.
One of the suspects, he said has been arrested while appealing to the general public for more useful information that could lead to the arrest of others.