Police cordoned off a field where the body of a woman was found Friday but declined to speculate whether the body was that of missing 19-year-old college student Brianna Denison.

The body was found about noon in the brush-covered field on the city's south side near a light industrial area, Reno police spokesman Steve Frady said.

About 45 law enforcement and crime lab personnel, including an FBI agent, were at the scene, which covers about two acres, he said.

Frady said the time and cause of death would be determined by an autopsy. Authorities have "no ID, not even a tentative ID," he said.

"I'm not going to speculate because we don't know who the person is," Frady said.

"We're processing this as a crime scene. We do that with death investigations," he told The Associated Press. "They are gathering information and evidence and photographing the area."

"We don't know how long the body has been out there. It's definitely a female. We don't know the age," he said.

Denison was abducted Jan. 20 by a serial rapist linked by DNA to a string of attacks near the University of Nevada, Reno campus.

Denison, a student at Santa Barbara (Calif.) City College who was visiting her hometown over winter break, was last seen sleeping on a couch at a friend's off-campus rental house.

Police have said DNA evidence links Denison's kidnapping to two other attacks on women near the university late last year, and that an earlier on-campus attack also could be related.