A chilling Facebook message is shedding new light on the motive behind yesterday's attack on the campus of Ohio State University. Authorities say Abdul Ali Artan, a Somali-refugee with permanent resident status, drove his car into a crowd of OSU students and attacked them with a large knife before being shot by campus police. He injured at least nine people, several of whom are still recovering in local hospitals.

In a Facebook post he published shortly before he embarked on his violent rampage, Artan said he had reached a "boiling point" and that he "just couldn’t take it anymore."

"I am sick and tired of seeing my fellow Muslim brothers and sisters being killed and tortured EVERYWHERE," Artan wrote in the Facebook message. "By Allah, I am willing to kill a billion infidels in retribution for a single disabled Muslim."

In the message, Artan states that if America wants Muslim's to stop carrying out "lone wolf attacks" it must "make peace with "dawla in al sham", a reference to the Islamic State.

The post has been deleted from Facebook along with the rest of Artan's profile. However, screen shots of the post were taken prior to deletion:

Artan's attack mirrors other so-called "lone wolf" attacks conducted in recent months including the truck attack in Nice, France.