The shooting on Thursday at South Mountain Community College, in Phoenix, resulted from a longstanding feud between the alleged gunman and one of his victims, according to The Arizona Republic. The two other victims were bystanders.

“This was not a random act against the school or a classroom,” Reuben Gonzales, a Phoenix police detective, told the newspaper. A college spokesman said police and campus-security officers responded within a minute of receiving 911 calls about shots being fired in a computer lab, according to the Republic.

The police believe the alleged shooter, Rodney Smith, is a former student at the college, according to the Republic. Mr. Smith, who is 22, was arrested shortly after the shootings yesterday. His intended victim remains in critical condition, while the other two victims were in stable condition today, according to the Associated Press. —Elyse Ashburn