The second floor of the Indonesia Stock Exchange building has collapsed, injuring around a dozen people according to reports.
A Reuters witness said police were cordoning off the multi-storey building and around a dozen people were being carried from the building on stretchers.
The collapse occurred during a midday trading break, the BBC reported, and the stock exchange was evacuated. Trading has resumed.
The building, located in Jakarta, is also home to a local World Bank office on the 12th and 13th floors.
Adam Harvey, an ABC south-east Asia correspondent, tweeted that there were "many casualties".
BREAKING: Scene at Jakarta stock exchange now. Floor collapse. Many casualties pic.twitter.com/n21IclcgWq
— Adam Harvey (@adharves) January 15, 2018