Two missing Winona teens

Two Winona teens have been missing since October 3. Their parents and authorities are searching for them. They were tracked as far as Chicago when their cell phones were either shut off or the batteries went dead. They are both friends of my son and he is very worried. No foul play is suspected but it is very uncharacteristic of these two teens to do something like this. This article has their pictures and a picture of the car in which they were traveling. http://www.wkbt.com/global/story.asp?s=11284250