Dramatic video shows the moment a mezzanine floor collapsed at the Indonesia Stock Exchange, injuring more than 70 people.
In the CCTV footage, a crowd of people – thought to be college students - are seen waiting to enter a room on the second storey of the Jakarta tower before the floor gives way beneath them.
In another clip, people can be seen fleeing in terror as slabs of flooring, glass and people plummet down into the main lobby.
No one is thought to have been killed but a nearby hospital said it was assessing 30 injured people, some of whom suffered serious bone fractures.
Reports suggested up to 77 people had been hurt, including students who were in the building on a college trip.
Police have ruled out a bomb as the cause of the collapse. Authorities said they will “audit the building”, last inspected in May.