Huge campuses of universities across the nation may excite prospective students. But what they do not know is that these vast campuses also attract anti-social elements, often without the knowledge of the authorities.

University of Houston campus has fallen prey to this menace with the campus becoming breeding ground for robbers with three robberies taking place within a week.

The campus is on alert and the university police were found patrolling the campus Friday after the third incident of robbery took place on late Thursday.

The latest in the chain of robberies took place at a parking lot. Police say a student was walking to his car when a man approached him with a gun. The student said he did not have money and then tried to snatch the gun from suspect.

Police say the suspect responded by hitting the student in the jaw, getting into his car, and driving off, reports abclocal.

Reportedly, two other armed robberies took place Wednesday and Sunday, where the suspects managed to escape with stolen cell phones and other personal property. These two incidents happened in broad day light and police say nobody was hurt.

Police believe that the three incidents are not related.

According to 39online, each victim has described the armed bandits as African-American males in their 20's. They are still on the loose and no arrests have been made yet.

In response to the crimes, the university has increased the security and is consolidating a task force to deal with these robberies. The UH police chief has promoted 10 people within the department and Monday, he will be announcing a name for the new crime prevention officer.

The police have warned the students not to roam about the campus alone, especially in wee hours and they have advised them to stay in groups.

"I think everybody just kind of tries to stay around somebody if you don't always walk with a certain person. It's a big campus, you don't really know everybody you're parking around so everybody kind of tries to stay around people they know," said University of Houston student Courtney Mills to myfox Houston.