Urgent: Amber Alert ??? Is it real?

My husband just received an Amber Alert.  2 little girls kidnapped around noon, near Harrison, Arkansas area.  Suspect driving brown jeep liberty.  Kansas plates # 436519. 

Now, I have been contacted and told this is a hoax. 

I don't know if it is or isn't.  I'm guessing it is. 

This is my biggest fear!!!!