Floor collapse at Indonesian Stock Exchange building. Massive casualties. Indonesia’s stock exchange is evacuating people in the vicinity after a floor collapsed during the midday trading break. The floor collapsed into the ground level of the bourse’s Tower 2, spokesman Rheza Andhika said by phone, adding that it wasn’t an explosion. Footage aired on local television channel showed several people lying on the ground at the entrance of the building. Watch this video to know more about the incident. This is a developing story.