The Norwegian group Det Norske Olse-Selskap (DNO International) is abandoning oil and gas exploration in the Inhaminga block, in the central Mozambican province of Sofala.According to a source in the Mozambican National Hydrocarbon Company (ENH), DNO is giving up because none of the four wells it drilled turned up any finds of hydrocarbons in commercially viable amounts.DNO-International invested about 30 million US dollars in the exploration. The drilling found some natural gas, but not in significant quantities. The Inhaminga block is onshore and covers a vast area of Sofala, including the districts of Cheringoma, Caia, Gorongosa and Maringue. Earlier work by DNO in the districts of Dondo and Muanza, also in Sofala, included aero-magnetic surveys, the acquisition of 2D seismic studies, geochemical sampling, and the opening of three wells. But here too the results were negative.