Two students of University of Colorado were arrested for allegedly giving marijuana-laced brownies to their oblivious classmates and professor at a university event, police said in a release.

On the occasion of "Bring food event" at their college, Thomas Ricardo Cunningham, 21 and Mary Elizabeth Essa, 19, distributed drug-laced brownies and got them stoned.

After consuming the marijuana-laced snack, many experienced dizziness and anxiety attack. Three from the class were rushed to hospitals for medical attention.

According to the university police, at about 10:20 a.m. Friday, UCPD were summoned to the Hellems Arts and Sciences Building on a report that a professor was complaining of dizziness and drifting in and out of consciousness. Paramedics transported her to a local hospital.

At about 4 p.m., a student's mother notified UCPD that her daughter was having an anxiety attack and was at a local hospital. On Saturday, a second student told UCPD that she felt like she was going to "blackout" after the class. Her family took her to the hospital for evaluation.

An investigation into the chain of incidents revealed the prank played by the two students. The three hospitalized victims and five other classmates were found to be suffering from the effects of tetrahydrocannabinol (THC), an active ingredient in marijuana.

During the course of interrogation, Cunningham and Essa admitted to mixing marijuana in brownies that was distributed to their victims. After which they were arrested and charged with multiple felonies, including conspiracy, assault in the second degree, inducing consumption of controlled substances by fraudulent means.

UCPD has interviewed the professor and 11 of the 12 students in class. Of those contacted so far, two were suspects, three were hospitalized, five others became ill and two did not eat the brownies. The three hospitalized victims have since been discharged.

CPD suggested that it believes this is an isolated incident and there's no ongoing threat to the campus community.