4 University of Idaho students were killed off-campus, police say. Authorities haven't detailed how or why.

• Four University of Idaho students were killed off-campus on Sunday, but how they died hasn't been revealed.
• Authorities have not yet detailed the cause of their deaths, which have been ruled as homicides.

Four University of Idaho students were killed off campus over the weekend, but authorities have not yet detailed the cause of their deaths.

Officers with the Moscow Police Department were answering a call about an unconscious person in the small town of Moscow — less than a mile from the college — just before noon on Sunday when they found the slain students.

The victims were identified by police on Monday as 20-year-old Ethan Chapin of Washington; Madison Mogen, 21, of Idaho; Xana Kernodle, 20, of Arizona; and 21-year-old Kaylee GonCalves of Idaho.

Their deaths have been ruled homicides, a police official told Insider, but authorities could not immediately provide details as to how they died.

"Details are limited in this investigation. Currently, there is no one in custody," the police department said in a statement on Monday as it asked for anyone with information related to the tragedy to come forward.

It added, "The Moscow Police Department and the City of Moscow is deeply saddened for the families of these individuals, fellow students and friends, and our community during this time. Our heartfelt sympathies go out to each and every person affected by this incident."

The department said that it does "not believe there is an ongoing community risk based on information gathered during the preliminary investigation."

University of Idaho President Scott Green announced in a statement to the college community on Sunday night that the school was notified of the deaths of the four students "living off-campus." They were "believed to be victims of homicide," Green said.

Out of respect for the students who were killed, in-person and online classes at the university were canceled on Monday. Classes will resume on Tuesday.