The Melbourne Cup has again been marred by the death of a horse, this time the Irish-trained The Cliffsofmoher.

The Aidan O”Brien-trained horse suffered a fractured shoulder during Tuesday's race and had to be euthanised, Racing Victoria's executive general manager – integrity services, Jamie Stier, said in a statement.

It is the fourth time in the past six years that the Cup has been shrouded by horses needing to be put down.

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