Melbourne Storm prop Nelson Asofa-Solomona is back in Australia to answer questions about a violent incident outside a Bali nightspot.

The Storm referred Asofa-Solomona to the NRL's Integrity Unit after the incident, which was captured on video and circulated on social media on Sunday night.

The Age and Sydney Morning Herald reported on Sunday night that Asofa-Solomona fought with the same person who allegedly hit Storm winger Suliasi Vunivalu with a coward's punch inside the night spot, leaving him with a cut under his eye.

The Storm on Sunday night announced it had reported the incident and launched its own investigation into allegations a player was involved in a fight in Bali where a number of Melbourne players were on holiday together.