Floor at Indonesia’s stock exchange collapses, more than 70 injured

"I heard a loud cracking sound. I saw a lady unconscious stuck under slab of concrete," she said, adding that the collapsed level was just above the reception desk.

She said there had been group of high school students on the level when it gave way.

The Indonesia Stock Exchange is located in central Jakarta, and the local office of the World Bank is also housed on the 12th floor of the complex, according to its website.

The building is part of a two-tower complex which was the target of a suicide bombing by Islamist militants in September 2000.

The exchange resumed business in the afternoon.

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