A snowstorm has claimed the lives of four students at North Dakota State University after they crashed their car on Interstate 94 in Minnesota.

All four victims were women and were identified as Lauren J. Peterson, Jordan N. Playle, Megan R. Sample, and Danielle R. Renninger. They were heading back to school at NDSU from Minneapolis, Minn. after visiting family over the long holiday weekend. 3 of the students, Playle, Renninger and Sample, were roommates.

Playle, Renninger and Sample lived together in a suite on campus. The fourth roommate, who was not in the car crash, has reportedly returned to her family in West Fargo.

“We had the most amazing weekend. She was so thankful for life,” Michael Renninger, Danielle’s father, told the AP Tuesday, fighting back tears. “She was making comments about how wonderful her life is. It was just so strange, thinking of it now.”

The women died when their car crossed the median and was broadsided by an SUV. The AP reports heavy snow, fog, strong winds and temperatures near freezing made travel difficult in the region.

The SUV that hit the women’s car was struck from behind by a third vehicle, the Austin Post-Bulletin reported. The driver of the SUV was hospitalized.

“I don’t believe I have ever been faced with this type of tragedy of this magnitude,” Prakash Mathew, NDSU’s vice president of student affairs, told the Minneapolis Star Tribune.

Grief counselors are now making themselves available at the campus of NDSU.