Witnesses said a loud blast was heard in the area around 6.30a.m, causing panic among residents.
However, the Rivers State Police Commissioner, Mohammed Indabawa, confirmed to an online medium, saharareporters, that the blast was from the impact made by the missile when it hit an uncompleted building at 98, Woji Street in Woji Town.
He said the helicopter was on routine maintenance at the NAF hangar in Port Harcourt when the missile accidentally took off and hit the building three kilometres away.
He said no death or injuries were reported.
More details later.