Did 4chan post foreshadow mass shooting?

Posted at 4:57 AM, Oct 02, 2015
and last updated 2015-10-02 04:57:42-04

Authorities are investigating an anonymous post on the website 4chan and whether it might be connected to a mass shooting at an Oregon community college.

The post has since been removed, but a cached version is out there. The post went online Wednesday afternoon and stated:

"Some of you guys are alright. Don't go to school tomorrow if you are in the northwest.

happening thread will be posted tomorrow morning

so long space robots"

A thread of comments follows the initial post and gets even more ominous. 

"Will post again in am, 10 min countdown. Won't say more to much to prepare."

A gunman opened fire Thursday at Umpqua Community College in Roseburg, Oregon, killing at least 13 people and leaving others injured. The gunman died during an exchange of gunfire with police.