An Illinois teen ended up behind bars Thursday after posting threats to other students on Facebook.

The unnamed 17-year-old student at Joliet Catholic Academy was taken into custody after several students noticed an argument on Facebook, in which he made repeated threats of violence against his fellow students. Being the good kids that they are, they told their parents about it, who proceeded to inform the authorities.

The row was apparently started over a girl or an Xbox game, and investigators are believe the argument might have been motivation for the threats. Joliet Police Chief Fred Hayes says the teen will probably be charged during the day, and a police search of the student's car and locker for weapons yielded none.

More here.