Explosives went off few meters to the secretariat of the All Progressives Congress (APC) at Garrison junction, Port Harcourt, Rivers state capital, on Sunday.
This sparked tension in the area. Security operatives stationed at the APC secretariat rushed to the spot where dynamites exploded but the suspected thugs who dropped it had fled in a Toyota Camry car which conveyed them there.
Earlier an explosion happened at a distant location in the oil-rich city around 11am.
The All Progressives Congress (APC) and the Peoples Democratic Party (PDP) are having their governorship primaries on the same day.
While PDP is holding its at Sharks Stadium, Port Harcourt, there is confusion in the APC. Two factions loyal to Magnus Abe, senator representing Rivers south east, and Rotimi Amaechi, minister of transportation, are set for parallel primaries.
Abe, who is opposed to the indirect primary approved by the leadership of the party in Abuja, has mobilised his men to hold direct primary across wards.
Amaechiās supporters are plotting to use the state secretariat for indirect primary.