Police have commenced an investigation into the brawl between billionaire James Packer and Channel Nine chief executive David Gyngell.

A spokesman confirmed on Tuesday morning that no formal complaint was made by either Packer or Gyngell but eastern suburbs police have launched an investigation and are appealing for any witnesses to come forward.

"Eastern Suburbs Local Area Command has commenced an investigation into an incident that occurred about 2pm Sunday on Sir Thomas Mitchell Road near the intersection of Campbell Parade at Bondi Beach," the spokesman said.