University of Nebraska-Lincoln police sent an email warning to students Tuesday after a woman reported being sexually assaulted by two men inside a campus dorm Saturday.
"University Police have determined that circumstances exist that may pose a threat to members and guests of the university campus community," Police Chief Owen Yardley said in the email.
In the "Timely Warning Bulletin," Yardley advised students to "take any necessary precautions" in light of the report.
The woman told police she and a friend returned to the dorm with two men they had met earlier while off-campus just before 11 p.m. Saturday, Yardley said in the email.
The woman said the men forcibly sexually assaulted her in her room before leaving at about 1:35 a.m. Sunday.
The case remains under investigation.
One of the men was described as a black man with short hair who was wearing a black North Face jacket, white Adidas T-shirt with "Omaha Basketball" written on it, red Adidas pants, white shoes, black T-shirt, and black stocking hat that spells "Fancy" on the front.
He was described as being 6-foot to 6-foot-3.
Police had only a generic description of the other man.
Students were advised to only allow trusted people they know into the dorms and their rooms or apartments.
Yardley also encouraged people to report suspicious behavior to police.