Weight Watchers International is suing rival weight-loss company Jenny Craig over ads it says are misleading and deceptive.

Weight Watchers, based in New York, says in the suit that Jenny Craig is running ads that refer to a study comparing Weight Watchers current weight-loss program and Jenny Craig's pre-packaged meals system.

But Weight Watchers says no such study has been done and the claims in the ads are not supported by fact or science.

"It is outrageous that Jenny Craig is trying to trick and fool consumers through this blatantly misleading advertising campaign, which makes clearly false and unsupported claims,” David Kirchhoff, Weight Watchers president and CEO said in a news release “The fact that Jenny Craig chose to deceptively try to compare themselves to Weight Watchers in a manner that is clearly unsupported by fact or science suggests to us a lack of confidence in their own current offerings.”

The lawsuit has been filed in the U.S. District Court in New York City. It asks for an injunction and damages along with a ban of the ads.

A call to Jenny Craig Inc., based in Carlsbad, Calif., was not immediately returned.

The Associated Press contributed to this report.