Anambra State Police Command Headquarters Axis has been blocked to traffic 24 hours after gunmen broke into Owerri maximum prison, freeing 1800 inmates.
Signs around the axis also advised motorists to use alternative routes.
The police headquarters sits at an axis that hosts the Amawbia prison.
Abia state had on Monday imposed night-time curfews on Aba and Umuahia to curtail threats from attack by unknown gunmen.