The police have made significant progress in their investigation of the recently discovered mass killings of rhino in the Etosha National Park. The death toll is expected to rise, if information at the sites of buried carcasses prove to be correct. A large number of suspects have been arrested and the list includes employees within the park. The Oshana police regional commander, Commissioner Ndahangwapo Kashihakumwa, is heading a team of investigators permanently deployed in Etosha since June 1.