Actress Sophia Bush says her comments about suffering "assault" and "abusive behavior" on the set of "Chicago PD" may be news to some, but that's because they "simply haven't been paying attention."

She used a Saturday Instagram post to respond to reporters who questioned why she waited a year and a half to air her grievances about conditions on the set of the NBC procedural, which she left in May 2017 after four seasons.

Bush fired back in a Friday Instagram post, writing, "If you have chosen not to listen to the frank, clear conversations I’ve had on the topic over the last year, that’s on you. Your lack of attention — to me and to ALL of the women who tell their stories into the void — doesn’t mean that we haven’t been screaming all along."

The post came four days after Bush appeared on the Dec. 10 episode of Dax Shepard's "Armchair Expert" podcast, where she discussed the negative impact filming "Chicago PD" had on her physical and mental health.

"The reality was that my body was, like, falling apart, because I was really, really unhappy,” she said, citing the set's cold weather as one unpleasant aspect of the set. She did not go into specifics about emotional or physical abuse.

However, she did allude to problems on the set while recounting how NBC had told her there was "no way" for her to leave the show early after signing a seven-year contract.

“I said, ‘OK, you can put me in the position of going quietly of my own accord or you can put me in the position of suing the network to get me out of my deal, and I’ll write an op-ed for The New York Times and tell them why,' " she said, claiming that she eventually found out that her complaints were "hidden" from Jennifer Salke, then president of NBC.

Bush, 36, summed up her experience shooting "Chicago PD" to Shepard as feeling "like I was standing butt-naked, bruised and bleeding in the middle of Times Square, screaming at the top of my lungs and not a single person stopped to ask if they could help me.”

It was not her only bad experience while working in TV.

In 2017, five years after her teen soap "One Tree Hill" went off the air, Bush, co-star Hilarie Burton and other female cast members wrote a letter accusing showrunner Mark Schwahn of "traumatizing" sexual harassment during the show's eight-year run on WB and CW. (He was suspended and later fired from E!'s "The Royals.")

Bush told Shepard that in hindsight, "One Tree Hill" wasn't as bad as "Chicago PD."

“Our experience on 'One Tree Hill' was unpleasant, but our boss who was a bad dude lived in L.A.,” she told Shepard. “Eighty percent of the time we were on set loving our experience and each other and then he would come to (the set in Wilmington, North Carolina) and it’d be like, 'Watch out for (expletive) Handsy-McHandsy over there.' There was a lot that was inappropriate but it wasn’t all the time…it wasn’t the same.”

“One was like, a guy who we’re like, ‘Oh God, he’s back.’ And one was a consistent onslaught barrage of abusive behavior,” Bush said, comparing "One Tree Hill" to "Chicago PD."

She continued, “You start to lose your way when someone assaults you in a room full of people and everyone literally looks away, looks at the floor, looks at the ceiling, and you’re the one woman in the room and every man who’s twice your size doesn’t do something, you go, ‘Oh that wasn’t worth defending? I’m not worth defending?' ”

She concluded Friday's post with a warning to her critics: "Do not forget that my 'titanium spine,' as my sister @hilarieburton calls it, was forged in fire. I am not a woman that you will ever reduce. Not one iota. None of us are."

NBC has not responded to USA TODAY's request for comment.

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