A kosher certification group sued JetBlue Airways Corp in New Jersey federal court Thursday, alleging JetBlue unlawfully used its trademarks to advertise food it had not certified.

According to the lawsuit, New York-based JetBlue sells an artichoke snack that it says is certified by Kof-K Kosher Supervision without the group's consent.

Kof-K has never certified any of JetBlue's products as kosher or given the airline permission to use its trademarks, according to the lawsuit.

A JetBlue spokeperson said Friday that the airline was investigating the claims. An attorney for Kof-K declined to comment.... Read More: Reuters