According to Abou Jeng and other scholars, the Barre regime rule was marked by a targeted brutal persecution of the Isaaq clan. Mohamed Haji Ingiriis and Chris Mullin state that the clampdown by the Barre regime against the Hargeisa-based Somali National Movement targeted the Isaaq clan, to which most members of the SNM belonged. They refer to the clampdown as the Isaaq genocide or Hargeisa holocaust. A United Nations investigation concluded that the crime of genocide was "conceived, planned and perpetrated by the Somali Government against the Isaaq people". The number of civilian casualties is estimated to be between 50,000 and 100,000 according to various sources, while some reports estimate the total civilian deaths to be upwards of 200,000 Isaaq civilians. Along with the deaths, Barre regime bombarded and razed the second and third largest cities in Somalia, Hargeisa and Burao respectively. This displaced an estimated 400,000 local residents to Hartasheikh in Ethiopia; another 400,000 individuals were also internally displaced.