An APC rally in Rivers state, has been interrupted by explosions and gunfire, reports say.
The blast occurred at a school in Okrika, in Rivers state, local media said, ahead of elections on 28 March.
It was not immediately clear if there were any casualties.
A small explosive device detonated as crowds gathered for the rally, but there were no injuries, witnesses told the claimed.
Organisers then decided to press on with the event in Okrika – a small port town south of Port Harcourt, in the heart of Nigeria’s oil producing region – but gunshots rang out, causing people to flee, the witnesses said.
“We have been attacked,” a spokeswoman for Rivers State governor governor Rotimi Amaechi told AFP.
No group has taken action for the attacks.
Sources: BBC, Channels TV