The parents of an Ohio infant say the girl often appeared groggy after attending a church day care where some workers are accused of giving children an over-the-counter dietary supplement at nap time.

Joseph and Andrea Coleman have filed a lawsuit against Covenant Apostolic Church near Cincinnati.

Their attorney, Alan Statman, said Wednesday that he is seeking class action status for the lawsuit.

Messages seeking comment were left at the church. The pastor has said he learned of the allegations Sunday and later fired two staffers.

Springfield Township police are investigating allegations that melatonin was given to some children.