An Ohio State University student posted a rant shortly before he plowed a car into a campus crowd and stabbed people with a butcher knife in an ambush that ended when a police officer shot him dead, a law enforcement official said.

Abdul Razak Ali Artan, 18, wrote on what appears to be his Facebook page that he had reached a “boiling point,” made a reference to “lone wolf attacks” and cited radical cleric Anwar al-Awlaki.

“America! Stop interfering with other countries, especially Muslim Ummah [community]. We are not weak. We are not weak, remember that,” the post said.

Two hours before that, a cryptic post on the page said: “Forgive and forget. Love.”

Officials cautioned that they have not determined a motive for the ambush, which sent 11 people to the hospital Monday morning. A senior law enforcement official told NBC News that investigators are trying to determine whether Artan had personal problems or something else that might have pushed him over the edge.

A police officer was on the scene within a minute and killed the assailant, likely saving lives, university officials said. “He engaged the suspect and eliminated the threat,” OSU Police Chief Craig Stone said.

Law enforcement officials told NBC News that Artan was a Somali refugee who left his homeland with his family in 2007, lived in Pakistan and then came to the United States in 2014 as a legal permanent resident.

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He lived briefly in a temporary shelter in Dallas before settling in Ohio, according to records maintained by Catholic Charities.

Artan attended Columbus State Community College for two years, graduating cum laude with an associate’s degree before moving on to Ohio State to continue his studies. He told a campus publication that on his first day at OSU, he was “kind of scared” to pray in public.

Source: http://www.nbcnews.com/news/us-news/suspect-dead-after-ohio-state-university-car-knife-attack-n689076