Two operatives of the Department of State Services (DSS) were killed on Friday in Anambra.
The officers were attacked as gunmen ambushed their convoy while on election campaign duty in Ekwulobia.
Videos showing the aftermath of the attack are circulating on social media.
The bodies of the deceased were hurriedly taken away from the scene as several residents converged.
Attacks in Anambra are on the rise ahead of the November 6 governorship election.