Classes were canceled for the rest of the day at the school, one of seven community colleges in Wyoming.
A meeting was held in the afternoon for the 150 teachers and students who remained. College president Walt Nolte addressed them, calling it the worst day of his more than 40 years in higher education. He encouraged the community to come together, Fujita said
"It is particularly painful because of our size," Fujita said of the small, tight-knit campus.
Counselors were speaking to students and planned to be available through the weekend. About 450 students live on campus.
Classes were to resume on Monday.
"We agreed it doesn't do any good to just set the students loose. It makes the most sense to have them come back to campus, where they can get help if they need help and come to terms with what happened," Fujita said.
The college plans a candlelight vigil and memorial service on Tuesday.
Walsh said police train for such incidents but had no warning of Friday's violence.
Wyoming Gov. Matt Mead, who went to the campus Friday evening, said it was too early to assess security precautions at the college.
"There's no sense in doing that now until we understand fully what has taken place," he said.
The governor added that the focus now "should be on the victims' family, the community college family, the president, the trustees and the students, and making sure we're attending to any of their needs."
Wyoming's three congressional delegates issued a joint statement lauding responders and expressing condolences to those affected.
"Any loss of life is tragic, especially when it hits so close to home for so many of us," Sen. Mike Enzi said. "What took place today is a reminder to always look out for one another in our communities and neighborhoods."
Casper College opened in 1945 as the state's first junior college and moved to its current site 10 years later. The campus consists of 28 buildings on more than 200 acres. The college provides more than 140 academic-transfer, technical and career programs.
Wyoming has only one four-year university, the University of Wyoming in Laramie, which serves more than 13,000 students.
Casper is Wyoming's second-largest city with a population of about 56,000. Wyoming residents refer to it as the "Oil City" because it's a hub for the state's oil industry.
Associated Press writers Ben Neary in Cheyenne and Matt Volz in Helena, Mont., contributed to this report.
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