Netflix has added a warning card that will run ahead of the Season 4 premiere of Stranger Things, in light of this week’s school shooting in Uvalde, Texas.

“We filmed this season of Stranger Things a year ago,” the warning card reads. “But given the recent tragic shooting at a school in Texas, viewers may find the opening scene of Episode 1 distressing. We are deeply saddened by this unspeakable violence, and our hearts go out to every family mourning a loved one.” The episode will also get a content warning for “graphic violence involving children” and “disturbing images."

The opening scene  was already released early online where Dr. Bremmer (played by Matthew Modine) is trying to study Ten’s own telekinetic abilities when all hell breaks loose down the hall, leaving behind a gruesome menagerie of bloodied, young subjects

On Tuesday, 19 children and two adults were killed when a gunman opened fire at Robb Elementary School in Uvalde, Texas. The 18-year-old suspect also was killed. The tragedy marked the deadliest American school shooting.