On Monday morning, there was a suspected explosion at the popular Mile 3 Park market in Diobu axis of Port Harcourt, causing panic.
Witnesses said the incident occurred at about 6:20am as traders were bringing goods into the park.
Several people were injured in a stampede following the incident, including one person injured in leg.
Traders in the market quickly parked their goods and left after the explosion.
The Nigeria Police Force, believed to have come from Nkpolu Police Division, Port Harcourt, moved to the scene immediately.
SP Nnamdi Omoni, a spokesperson for the State Police Command, said he has yet to receive detailed information about the incident