Ten minutes before the Morse-Ezra Stiles college screw was set to end early Saturday morning, more than a dozen New Haven police officers and liquor agents raided the downtown nightclub where the event took place.

Five students were arrested, Dean of Student Affairs Marichal Gentry said in an e-mail to the Yale College community Saturday morning. According to interviews with about a dozen eye witnesses, one student was Tasered. Gentry said one student was taken to Yale-New Haven Hospital but has since been released.

Armed with what witnesses said were assault rifles and wearing what appeared to be SWAT gear, the officers stormed into the Crown Street club Elevate at 12:50 a.m., yelling at students to hit the ground, shut up and get out their IDs. By the end of the night, dozens of Morse and Stiles students turned to their residential college deans and masters for answers, asking whether police brutality had occurred.