A loud explosion heard from inside Rio’s Maracana Stadium on Sunday was sparked by a tool box.
The explosion came shortly after a robot was sent into the stadium to inspect the tool box Channel 7 reported.
‘There was definitely an explosion after the robot went in,' a Channel Seven spokesman said.
‘We are trying to confirm whether the explosion was the robot destroying the package or the package went off before the robot go to it.’
The Maracana Stadium will host the Olympic opening and closing ceremonies.
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