JOHN McCarthy's death in Las Vegas was an accident, a US coroner as ruled. But American authorities have declined to say whether drugs or alcohol were found in the Port Adelaide footballer's system.

McCarthy, 22, died last month after falling more than nine metres from the roof of the Flamingo Hotel.

The late John McCarthy. Credit:Getty Images

John Fudenberg, assistant coroner in Clark County, Nevada, said McCarthy died from injuries sustained in an accidental fall.

''We ruled the cause of death as multiple injuries due to a fall from height and the manner of death is accidental,'' he said.