Persona 4 ending??? D: please, all my persona fans? ;P?

I LOVEEEEEE the game. I havent had alot of time to play it though.... And someone told me nanako and yukiko die. And that teddy was the killer. I NEED TO KNOW IF THIS IS TRUEEE T . T MY TEDDY-KUN CAN'T BE A KILLER!!!! Please answer ASAP! :P & yes. I know its a old game <3