Mark Tenally/Associated Press

Chicago Bears head coach Matt Nagy says running back Tarik Cohen "feels bad and is apologetic and embarrassed" about accidentally showing teammate Kyle Long naked in front of his locker during a video live stream on Instagram. The incident took place after Monday's win over the Washington Redskins.

Nagy addressed what he called an "unfortunate" situation at a Wednesday press conference:

"Without a doubt, it is [a policy going forward]. First of all, it's a league rule, so that's that. And I think it's unfortunate that that happened. Tarik feels bad and is apologetic and embarrassed that it happened.

"I think it's something that [what] you need to do is you learn from it. It was a mistake and nothing that is malicious at all. But it was a mistake, so let's make sure that that mistake doesn't happen again to all of our players."

Per Patrick Finley of the Chicago Sun-Times, Long wasn't upset about the incident, saying, "S--t happens."

Still wearing his full uniform, Cohen fired up Instagram Live to stream his celebration following the Bears' 31-15 victory.

Per Jeremy Layton of the New York Post, Long was behind Cohen standing at his locker naked preparing to get dressed and in full view of the camera. Cohen took down the video after realizing what happened.

The Bears' official social media accounts regularly post celebration videos following victories. They are often recorded immediately after games end as players walk into the locker room, showcasing dancing and Nagy's postgame speech.

Official NFL rules prohibit players, coaches and football operations personnel from using all forms of social media starting 90 minutes before kickoff until all traditional postgame interviews have been completed.