When Farid’s friend called crying for help on Sunday, he jumped on his bike and quickly rode to Tehran’s Sharif University.Scenes of violence and “savagery” met him when he arrived at the campus of the elite university, he said, where hundreds of students had been trapped in the parking lot by Iran’s Revolutionary Guard Corps, according to videos CNN verified from social media.“They were using gases… [that are] banned internationally… it was a war zone… there was blood everywhere.”In one video posted to social media from the scene, police can be seen detaining people and carrying them on motorbikes.And then the (professor) of science came to talk to them because they were chanting stuff… the students were led out by the security forces of the university, and they were then stopped by Sepahs (IRGC forces), wearing normal people’s clothing,” Farid told CNN.The Student Council was trying to make a tally, but we won’t know for sure for another five, six hours.”Citing a source at the university, Iranian state news agency IRNA said Monday that 30 of the 37 students arrested during the protests had been released."