Explosives suspected to be dynamite shattered the secretariat of the All Progressives Congress along Aba Road in Port Harcourt, Rivers State capital, in the early hours of Saturday.
The explosion brought down the gate of the secretariat while doors, windows and other property were destroyed.
This is the second time the Chief Tony Okocha-led APC would be experiencing such an attack at its secretariat this year.
This came as the local government elections is holding in the state today as the Rivers State Independent Electoral Commission said on Friday that all sensitive materials have been distributed to the various local government areas.
A viral video of the incident scene showed some workers at the facilities going round to ascertain the extent of damage.