Police say that the University of California-Merced student who was shot and killed by police officers after stabbing four of his fellow students on Wednesday went on his rampage after being kicked out of a study group, the Associated Press reports.

Police have identified the attacker as 17-year-old Faisal Mohammad, the Merced Sun-Star reports. Merced County Sheriff Verne Warnke said that authorities found a manifesto on Mohammad’s body, which included “a detailed list of his targets and his intentions.”

Warnke said that the young man intended to stab a police officer, take the officer’s gun and shoot students in a dormitory. “He was mad at a student,” Warnke said, for having been “kicked out of a study group.”

There was no evidence to believe Mohammad’s actions were “in any way related to terrorism,” the university chancellor, Dorothy Leland, said. He “appears to have been motivated by personal animosities, not a political agenda” and “it would be irresponsible” to infer terroristic motives “based solely on the ethnicity of the suspect.”

Warnke concurred. The attack, he said, was an “act of an individual for a vendetta.” There is “nothing to indicate there was any political or religious motivation.”

Image via NBC News/U.C. Merced. Contact the author of this post: brendan.oconnor@gawker.com.