Story highlights Police on Mackinac island are investigating an incident involving aides for Sen. Marco Rubio and Sen. Rand Paul

Paul aide John Yob alleges Rubio aide Rich Beeson hit him while they were at a bar Thursday night

(CNN) Police on Mackinac Island, Michigan, said Friday they are investigating allegations of a bar fight between top aides for Republican presidential contenders Rand Paul and Marco Rubio.

John Yob, a Paul aide, alleged in a Facebook post early Friday morning that Rubio deputy campaign manager Rich Beeson hit him at a bar on Mackinac Island, where a number of Republican candidates have gathered for the weekend. Yob alleged in his post that he had video of Beeson assaulting him. He later provided that video to CNN.

Mackinac Island Police Chief Brett Riccinto told CNN Friday morning that he had not yet seen the video and wanted to review that, along with witness statements, before making any determinations. Police said a formal report has not yet been completed.

"Any time you're at a bar past midnight things seem to get misconstrued as to what happened," Riccinto said. "I'd really like to see this video."

The video is grainy and details are difficult to discern, but it does appear to show a physical confrontation. Yob said the man who hit him in the video is Beeson, but CNN could not independently confirm.

Read More