A mezzanine floor inside the Jakarta Stock Exchange tower collapsed on Monday, injuring nearly 80 people and forcing a chaotic evacuation.
Security camera footage circulated online showed the collapse, and group of people plunging several metres to the ground as the structure gives way beneath them.
People fled the building through a lobby strewn with debris. Emergency personnel tended to the injured on the grass and pavement outside the tower.
National police spokesman Setyo Wasisto said most of the injured were college students from Palembang in Sumatra who were visiting the stock exchange as part of a study tour.
Wasisto ruled out terrorism as a cause of the collapse.