A man tried to conceal his penis behind a book Thursday night while masturbating inside a campus library, reports stated.

A UA student was on the first floor of the Main Library, 1510 E. University Blvd., when she saw a man masturbating approximately 15 feet away.

He was sitting with a book in front of him while shaking and staring at the female student, she told police, reports stated.

The student left after several minutes and said that she did see the man masturbating, despite his clandestine penis, reports stated.

She said the man was between 26 and 30-years old and wants to press charges if police catch the suspect. Police believe that the suspect may be the same man who had been seen masturbating in the library earlier in the semester.

Two students saw a man masturbating Sunday evening inside a campus library, reports stated.

The man was seen on the fifth and fourth floors of the Main Library, 1510 E. University Blvd. masturbating with his penis exposed, reports stated.

The women described the man as being in his 40s, having blond hair, and wearing a blue denim shirt with a white undershirt.

Officers searched the area but could not find anyone who matched the description.

There are no suspects but the students said they would call police if they see him again.

A UA student was struck with a chain while walking home Tuesday night, reports stated.

She was walking south on North Euclid Avenue near East Fourth Street just before 3 a.m. when a man approached her and wrapped the chain around her arm, reports stated.

The student ran into the Tyndall Avenue garage before calling for help.

Police saw a man swinging a chain around his body while in front of his house, which was situated close to where the incident occurred. Police drove the student past the man, but she was unsure if that was the man who struck her with the chain, reports stated.

The man was released at the scene.

Two UA students ran away from a man Tuesday evening after he yelled "I'm going to fucking attack you," the students told police, reports stated.

The women were walking home from the Texaco gas station, 501 N. Park Ave., when an army-jacket clad man yelled at them and chased them briefly, reports stated.

The students ran into a nearby residence hall where they called for help.

Officers saw a man who matched the suspect's description near the gas station. Officers ran a background check on the man and learned that he had a warrant issued for his arrest for camping and having a glass container in a city park.

Before police asked if he had been harassing students, the man told police that if anyone who accused him of yelling and scaring people was lying, reports stated

The man also told police that he was a UA physics student. Officers found no proof of the man's enrollment when they checked the UA computer system, reports stated.

The student identified the man as the person who chased and yelled at them.

Graphic photos of men and women having sex were placed on vehicles parked at a campus sorority, reports stated.

A person who asked police to remain anonymous said the photos were distributed at the Alpha Phi sorority, 1339 E. First St., sometime between Friday night and Saturday morning.

Police removed the 20-30 pornographic fliers and took them back to UAPD where they will be stored as evidence.

"Senor Caliente was here" and "to be continued" were written on the front of the flier. The pornographic pictures were seen on the back.

There are no suspects and no witnessed at this time.

A UA student lost her cellular phone Wednesday night, reports stated.

The student last saw her phone at 8 p.m. at the Student Union Memorial Center, 1303 E. University Blvd., and noticed it missing two hours later.

She went back to the union but was unable to find her phone. The value of the phone is unknown at this time, reports stated.

Police Beat is compiled from official University of Arizona Police Department Records. For a complete list of UAPD activity, the daily resumŽ can be found at www.uapd.arizona.edu.