Officials of the Edo State government believe the killing of Mr Oyerinde is a series of attacks targeted at the governor who is standing for re-election on July 14.
The Chief of Staff to the Edo State Government Osarodion Ogie confirmed the incident.
Eyewitnesses say four gunmen had broke into his fenced compound in Ugbor GRA, Benin City.
Only last week, precisely on Saturday three journalists were killed in a car crash involving Oshiomhole’s convoy and a 911 Mercedes Truck, an incident the governor has maintained was premeditated.
Government officials in Edo, however, believe that the accident was masterminded by opposition politicians,as part of an assassination plot targeted at the governor.