CARMEL, Ind. – A pro-abortion student group is suing Carmel Clay Schools because they allege high school officials discriminated against them by refusing to allow them to put up a pro-abortion banner.

The debacle stems from a similar complaint by pro-life students in November.

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Carmel Teens for Life members spent 25 hours painting a banner with 300 hearts – each symbolizing 10 lives aborted every day. The banner, which included the phrase “3,000 Lives Are Ended Each Day,” was initially approved by school officials, but administrators allegedly tore it down and threw it in the garbage after a single complaint from a student who found the message “offensive,” Fox 59 reports.

Carmel Teens for Life contacted the Liberty Council, a religious liberty nonprofit, and threatened to file a lawsuit if school officials did not reverse the decision, which they did in February, allowing the students to hang a newly created banner in the cafeteria for 10 days.

“Our decision to allow the sign to return is not the school’s endorsement of the message any more than our decision to remove the sign was the school’s rejection of that message,” district lawyer David Day said at the time.

The incident apparently convinced other students to start a pro-abortion club called “Voices United,” and they sought to hang their own banner in the cafeteria to counter their pro-life classmates, Fox 59 reports.

“The high school has refused to extend a similar opportunity to post advocacy signs to Voices United, and in doing so has engaged in viewpoint discrimination in violation of the First Amendment of the United States Constitution,” according to the lawsuit filed by the ACLU of Indiana on behalf of Voices United.

Following the episode with Carmel Teens for Life, district officials clarified the student sign policy to prevent future conflicts, limiting signs to the size of a standard piece of paper, and prohibiting any messages other than the dates and times of club meetings, the Indianapolis Star reports.

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Carmel superintendent Nicholas Wahl issued a statement about the recent Voices United lawsuit this week that contends the pro-abortion students haven’t followed the rules.

“New signage rules for student clubs at Carmel High School were implemented January 3rd. These rules, as well as the approval process, have been very clearly communicated to both students and club sponsors and are posted online where they are easily accessible to all involved,” Wahl wrote.

“Voices United didn’t become a student club until February 28th and has still not completed the necessary requirements to post signs in the high school – including the submission of a club logo and the draft of a proposed sign. It is our responsibility to enforce these new signage rules equitably among our more than 150 student clubs at the high school.”