No fewer than four persons were Friday feared dead, while 20 others sustained serious injuries in an explosion that rocked a factory in Ijako area of Sango-Ota, Ado-Odo Ota Local Government Area of Ogun State.No fewer than four persons were Friday feared dead, while 20 others sustained serious injuries in an explosion that rocked a factory in Ijako area of Sango-Ota, Ado-Odo Ota Local Government Area of Ogun State.