The Golden State Warriors are taking "every legal course of action" to discover how video of Draymond Green punching Jordan Poole during a scuffle at practice Wednesday was made public, sources told ESPN.

Green apologized to the team and to Poole on Thursday, before Warriors coach Steve Kerr, general manager Bob Myers and teammate Stephen Curry addressed the media regarding the incident.

TMZ on Friday morning published video of the incident, which took place during a practice closed to the media.

In the video, Green steps up to Poole, who reacts by shoving the Warriors veteran. Green then punches Poole, knocking him down, before several people at the practice intervene to break it up. There was no video showing what led up to the incident.

Sources told ESPN that the Warriors have been "aggressively investigating" both the incident and the release of the video.

The Warriors are still in the process of disciplining Green, but Myers said before the video was released that he did not expect Green to miss any games due to punishment.

"These things happen. Nobody likes it, we don't condone it, but it happens," Myers said Thursday. "Draymond apologized to the team. Jordan was there in the room. ... As far as any suspension, punishment, fine, we will handle that internally."

ESPN's Kendra Andrews contributed to this report.