PITTSBURGH — (WPXI) – Streets and campus buildings have reopened after Pitt police declared a public safety emergency on O’Hara Street during a demonstration on campus on Tuesday evening. A planned demonstration took place outside of the O’Hara Student Center as Conservative commentator, Michael Knowles, took the stage in a debate about the transgender community. Police said an incendiary device, which was later identified as a smoke bomb, was set off outside the O’Hara Student Center. There was also an image of Knowles burned in effigy. During the protests, students were able to access residence halls with proper identification. Access for all guests not affiliated with the university was restricted. No injuries were reported during the demonstrations. Pitt police said medics were called to the area as a precautionary measure.