India, March 16 -- A St. Patrick's Day frat party turned into chaos when a rooftop collapsed on a crowd of revellers, leaving at least 16 people injured. The incident occurred at a courtyard near the University of Pittsburgh, where up to 500 students had gathered to celebrate, only for the roof to give way beneath them, plunging several partygoers into a dangerous situation.

According to the video which has since been going viral on social media, about two dozen people were clad on a shingled roof with even more people in bright green caps taking shade beneath it as the crowd grooved to the music during the celebration. In a fraction of a second, the back of the roof gave up and sank in as it got detached from the Semple Street building....