LAKE FOREST, Ill. -- Chicago Bears coach Matt Nagy expressed regret that running back Tarik Cohen livestreamed a video on his Instagram account from the team's locker room after Monday night's victory in Washington that unwittingly showed right guard Kyle Long standing in front of his locker naked.

"Without a doubt, it is [a policy going forward]," Nagy said Wednesday. "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."

NFL policy strictly prohibits players from posting messages on any social media platform from 90 minutes before kickoff through all postgame interviews.

"I apologized to Kyle," Cohen said. "It wasn't a joke. It was unintentional, but it's my fault because I shouldn't have been on social media in the locker room. I reached out to Coach Nagy immediately before he even found out about it. I wanted him to know that it was my fault, my bad, and that I was willing to take responsibility."

Long said it was a "wrong place, wrong time" situation and that he holds no bad feelings toward Cohen.

"Tarik texted me immediately as soon as he found out and told me that he was so sorry," Long said. "I said, 'Dude, it's okay, s--- happens.' What are you going to do? The plane ride home was like a comedy club, as you could imagine. But I'll take it for big guys around the league. I'll take that one.

"I'm just trying to shower, and the next thing you know ... I'm on the internet. I'm just glad it happened after a win and people were in a good mood. That way, no one made fun of me for my play and my ... whatever."

In 2017, wide receiver Antonio Brown, then a member of the Pittsburgh Steelers, used Facebook Live to stream footage of the team's postgame locker room celebration after a playoff win against the Kansas City Chiefs. The video captured Pittsburgh coach Mike Tomlin referring to the New England Patriots as "a--holes." The Steelers lost to New England in the AFC Championship Game the following week.

After every win, the Bears release a video of their postgame locker room celebration -- nicknamed "Club Dub" -- but it is done via the team's official Twitter account.