MY 2001 elantra is having a problem with panic alarm. Several times today the panic siren sounded for no apparent reason. My keys were in a locker inside the building and nobody was in the immediate vicinity of the car.

 

It's not the panic it's the alarm going off. Make sure all the doors, trunk and hood are closed fully and the switches are operating correctly.

 

Like Nova had suggested, check your doors and trunk. Also, be sure the remote key is what you used to open and lock the door.