State-owned Indian Oil Corp (IOC) has partner Delonex Energy, a new Africa-focused oil and gas explorer led by former Cairn India chief Rahul Dhir, to win its maiden oil block in Mozambique.IOC and Delonex were awarded onshore Block P5-A in southern Mozambique, a company executive said. The combine was declared winner alongside the consortium of Russia's Rosneft and ExxonMobil that won rights for three offshore blocks. It was awarded three contract areas: A5-B in the Angoche Basin as well as Z5-C and Z5-D in the Zambezi Delta in a former Portuguese colony of Mozambique.