Story highlights Many of the injured were students visiting the exchange from Sumatra

Terrorism has been ruled out as the cause of the collapse, which is still being investigated

Jakarta, Indonesia (CNN) At least 77 people were injured in Jakarta Monday when an internal walkway inside the Indonesian Stock Exchange collapsed suddenly, causing widespread damage to the building's main lobby area.

CCTV footage circulated online captures the precise moment the mezzanine walkway gives way, sending at least a dozen people crashing into the lobby area below.

Jakarta police spokesman Argo Yuwono said 77 people were being treated at four local hospitals, most with minor injuries. No fatalities were reported.

The 32-story twin tower complex, located on the busy Jalan Sudirman road of the Indonesian capital, is among the city's best known landmarks and houses the regional headquarters of numerous international organizations including the World Bank.

It was previously targeted by Islamist militants in a car bomb attack in 2000. But in a statement provided to reporters, a police spokesman ruled out the possibility of terrorism as a cause of Monday's collapse.

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