Air accident investigators said on Wednesday that medical tests conducted on blood samples of Argentine footballer Emiliano Sala showed high levels of carbon monoxide. Special reports from Britain's Air Accident Investigation Branch stated that toxicology tests showed that the deceased player's blood showed a 58% saturation level of carboxyhaemoglobin, which is a mixture of carbon monoxide and hemoglobin. According to doctors, exposure to carbon monoxide can lead to damage to the brain, heart and nervous system, and a level above 50% is potentially fatal, causing seizures, loss of consciousness or a heart attack. Sala's family said a detailed examination of the plane's wreckage was needed to determine how the gas was able to leak into the cabin. Sala, who died at the age of 28, was on his way from his former club, Nantes, in western France, to Wales to join the Cardiff City team, when the plane carrying him disappeared in January 2019. His body was recovered when the wreckage of the plane was discovered about two weeks later. For more on Euronews: Sala's body arrives in Argentina in preparation for the funeral ceremony A humanitarian gesture from Kylian Mbappé to the family of pilot Emiliano Sala