BROWNSBURG, Ind. (AP) — A federal lawsuit has been filed on behalf of two Indiana school cafeteria workers who were disciplined after posting concerns about school spending on social media.

The lawsuit was filed Monday by the American Civil Liberties Union of Indiana, which says the Brownsburg Community School District Corp. workers’ free speech rights were squelched.

According to the lawsuit, a human resources officer told Tina Gracey and Brenda Farnsworth last month that their posts on a public Facebook group were against the district’s social media policy. The lawsuit says they were given a written warning and were told they could be fired for posting similar messages.

Superintendent Jim Snapp told the Indianapolis Star he couldn’t comment on a pending lawsuit, but said school officials will look into the allegations.