Authorities believe Faisal Mohammed self-radicalized and had no direct contact with the militant group

FBI: November Stabbing Attacks by University of California-Merced Student Were Motivated by ISIS

An 18-year-old student at the University of California-Merced who stabbed four people before he was shot and killed by authorities last November was motivated by ISIS, the Federal Bureau of Investigation announced.

An FBI statement obtained by PEOPLE claims Faisal Mohammed, a U.S.-born student, had ISIS propaganda on his computer. Officials believe he was self-radicalized because he had no direct contact with the organization.

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Investigators claim Mohammed’s own writings revealed his attack was planned in advance.

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All of Mohammed’s victims survived the November attack.

The FBI says Mohammed first stabbed two students with a hunting knife inside a classroom. Next, he attacked a construction worker who came to the students’ aid. As he was trying to flee the campus, he stabbed a university employee.