DAVID MUIR: To another campus now, and tonight, the FBI is now on the case after several attempted abductions, all of them involving young women being followed at the University of Arizona. Here's ABC's Zohreen Shah tonight.
ZOHREEN SHAH: Tonight, the University of Arizona on edge after the attempted abductions of three female college students in the last week.
CHRIS OLSON, UAPD CHIEF: UAPD is enhancing its patrol capabilities. We're working hard to saturate the campus within the area and outside the area.
SHAH: The three incidents taking place within a mile of the Tucson campus, repeating a similar pattern. A man following the women in his car. One victim attacked from behind, screaming before the suspect fled. A second woman reporting being followed by that vehicle. The third woman groped, but able to get away.
All of the victims describe the suspect as a man 30 to 40 years old, around six feet tall, with a medium heavy set build, and close cropped hair. Police say he is driving an early 2000s dark blue Toyota Camry or Corolla with tinted windows and Arizona plates. Authorities urging students to take precautions while the suspect is on the loose.
STUDENT: I'll have to be on the phone with somebody that's, like, nearby.
SHAH: And David, the FBI's helping local officials, offering to process any evidence at Quantico to help develop leads on the suspect as quickly as possible. David.
MUIR: Zohreen Shah tonight. Zohreen, thank you.