efe-epaBy Albert Traver Minneapolis

Two separate autopsies have found that last week's death of George Floyd in police custody - a disturbing incident that occurred in this midwestern city and has triggered protests and riots across the United States - was a homicide.

They differ, however, in what caused the African-American man's death.

While an independent autopsy commissioned by Floyd's family found that he died of asphyxiation due to neck and back compression, the Hennepin County Medical Examiner in Minneapolis, the largest city in the US state of Minnesota, ruled that the victim experienced "cardiopulmonary arrest" while being restrained by a white police officer, Derek Chauvin, during his arrest on May 25.