Police had to remove a woman who brought an “emotional support squirrel” on a Frontier Airlines flight headed from Orlando, FL to Cleveland, OH.

Frontier says the passenger had noted in her reservation that she was bringing an emotional support animal with her on Flight 1612 Tuesday night. But she did not indicate it was a squirrel.

The airline says rodents, including squirrels, are not allowed. The airline says police were called when the passenger refused to leave the plane.

Police requested the other passengers disembark while officers dealt with the woman, who was eventually escorted into the main terminals.

The flight left for Cleveland about two hours later.

Earlier this month, Frontier announced a new policy on emotional-support and trained service animals that is set to go into effect Nov. 1. It allows cats and dogs as emotional-support animals and restricts trained service animals to cats, dogs and miniature horses.

Emotional-support animals, or “comfort animals,” are not the same thing as service animals or therapy animals, which are typically trained to assist people with emotional and physical disabilities. Emotional-support animals are not covered under the Americans With Disabilities Act, meaning businesses are not required to accommodate them. Federal regulations do permit them on airplanes but give the airlines permission to turn away unusual animals.