UPDATE with responses Stranger Things creators and showrunners Matt and Ross Duffer say they are “deeply upset” about a crew member’s allegations of verbal abuse, while Netflix has found no wrongdoing on the set.

In a statement, the Duffer brothers said, “We are deeply upset to learn that someone felt uncomfortable on our set. Due to the high-stress nature of production, tempers occasionally get frayed, and for that, we apologize. However, we think it is important not to mischaracterize our set, where we believe strongly in treating everyone fairly regardless of gender, orientation, race, religion, or anything else. We remain totally committed to providing a safe and collaborative working environment for everyone on our productions.”

Netflix also weighed in, noting, “We looked into the concern that was raised when we heard of the allegation on Thursday, and found no wrongdoing. Maintaining a safe, respectful atmosphere on set is important to us, and we know it is to the Duffer Brothers as well.”

In an Instagram post this week, crew member Peyton Brown wrote that she would not be returning to the set to work on Season 3 of the series because of alleged verbal abuse toward some women on the set.

“I personally witnessed two men in high positions of power on that set seek out and verbally abuse multiple women,” Brown wrote. “I promised myself that if I were ever in a situation to say something that I would. I have 11.5 thousand followers who can hear me say this, TIME IS UP.” She later confirmed to a commenter that the men were the Duffers.

Brown later deleted the post, but a screenshot was captured by Entertainment Tonight. She further alleged in a post that yelling occurred and the Duffers made threats to the crew and insulted them, which caused several crew members to quit.

The Stranger Things series is on hiatus but gearing up for Season 3, which is expected on Netflix in 2019.