ATLANTA -- Georgia Tech Police Chief Teresa Crocker says one suspect is believed to be responsible for the recent attacks on three female students over four days.

None of the victims was seriously injured, and all gave very different descriptions of their attacker to Georgia Tech Police.

"Nobody has gotten a good look at [the suspect's] face," Crocker said when asked about the differing descriptions. "We believe it's one person."

The height on all three descriptions has been the same, 5-feet-8-inches tall.

One issue Crocker said was problematic in the investigation of the crimes is that two of the victims took more than 12 hours to report their assaults, which hampered efforts to gather evidence.

"The Institute is issuing a safety advisory tonight with safety tips to remind students, faculty and staff to report any suspicious activity immediately to Georgia Tech Police," said Georgia Tech spokesman Matt Nagel.

Extra Atlanta Police patrols will begin on campus as early as Wednesday night, with officers on foot, bicycle, on Segways and in cars throughout the campus area. Officials said this was their highest priority.

All of the victims were walking alone at night, and all three were grabbed or pushed from behind.

In each case, the attacker ran away after the women screamed or fought back.

Georgia Tech issued these safety tips for students:

Walk in groups

Be aware of your surroundings

Call the campus transportation (the Stingerette) for a ride home 404 385-7433 (RIDE)

Program the Georgia Tech police number into your cell phone

Here are the crime reports posted on the Georgia Tech Police Department's website:

10/4/2011 @ 12:50 a.m. -- A female student reported that as she was walking along McMillan Street, near Turner Place, an unknown male approached her from behind and grabbed her around the waist. The female struck the male and ran. The male fled on foot from McMillan Street towards Eighth Street. The student was not injured.

Description of Suspect:

Tan skinned male

5'8" tall

175 pounds

Dark hooded sweatshirt

Dark jeans

White tennis shoes

10/1/2011 @ 8:15 p.m. -- A female student reported that as she was walking along Tech Walkway, near the Clough Undergraduate Learning Commons, an unknown male approached her from behind and grabbed her thigh in a bear hug. The female screamed and was able to pull away from the male. The male fled on foot towards the outdoor seating area of Einstein's Bros Bagels located at the Student Center Commons.

Description of Suspect:

Late 20's to mid 30's

5'6" tall

160 pounds

Brown hair

Light brown camouflage jacket

Brown knee-length athletic shorts

Tennis shoes

Ran with a noticeably awkward gait

10/1/2011 @ 12:15 a.m. -- A female student reported that as she was walking near Fourth Street, NW and Fowler Street, NW, an unknown male approached her from behind and pushed her up against a wall near the Wesley Foundation. The male undid her pants and when she yelled, the male fled on foot towards Tech Square. The female received minor injuries.

Description of Suspect:

Black male

5'8" tall

Average build

White baseball cap

All of the incidents are being investigated by the Georgia Tech Police Department. If you have any information, please call 404-894-2500 .