September 5 (SeeNews) - The Zagreb bourse said on Wednesday oil and gas company INA [ZSE:INA-R-A] and retailer Konzum [ZSE:KNZM-R-A] will replace civil engineering company IGH [ZSE:IGH-R-A] and shipping company Uljanik Plovidba [ZSE:ULPL-R-A] in its 25-share benchmark CROBEX index as of September 24.