SLB,
There seems to be little information on this crash as yet and what there is, is contradictory.
The Air Safety Network of the Flight Safety Foundation reports the type as a 365N with 5 dead:
Aviation Safety Network
The French BEA (Bureau d'Enquêtes et d'Analyses pour la sécurité de l'aviation civile) reports 4 fatalities and 4 survivors:
BEA Open Enquiries
Helihub also reports 4 fatalities and that the manufacturer's serial number was 6220. This was first registered on 12 January 1989
Of the fatalities, one was identified as the pilot, Ejimofor Omesili:
Graphic News