The Golden State Warriors are taking “every legal course of action” to find out how footage of Draymond Green punching Jordan Poole during practice was leaked to TMZ, according to ESPN’s Ramona Shelburne and Adrian Wojnarowski.

Green apologized to the team and Poole on Thursday, and Warriors head coach Steve Kerr, general manager Bob Myers, and star point guard Steph Curry addressed the media about the incident.

Friday morning, TMZ released the footage of the practice, which had been closed to the media. Sources told ESPN that the Warriors are “aggressively investigating” both the practice incident and how the footage was leaked.

The incident between Green and Poole at the Warriors’ practice began with the two players yelling at each other before they got in each other’s faces and Green threw a punch at Poole.

It is unclear what started the verbal jousting between the two that eventually led to physical violence, but Myers said he doesn’t believe the fight was about who may or may not get paid ahead of the October 17th contract extension deadline.

Myers added that he’s grateful everyone is fine and said these things happen in the NBA.

“It’ll take some time to move through, but we’ll move through it and move forward, and I’m confident that we will,” Myers said. “We’ve got a good team, we’ve got good leadership, we’ve got some guys that have been here a long time.”

The Warriors will open their season on Oct. 18 with a championship banner raising ceremony before facing off against Lebron James and the Los Angeles Lakers.