Six people have been taken to hospital after a fire at a 30-storey building in Melbourne's CBD.
Forty-eight people were treated by paramedics for smoke inhalation.
An electrical substation exploded at about 12.30pm AEDT, sending smoke through Marland House at 570 Bourke Street.
The Metropolitan Fire Brigade says eight people were trapped in lifts after the power was shut down.
Spokesman David Mann says firefighters were able to respond quickly.
"Once we knew where they were and the lift company came along there was [a] fairly quick [response] just in sending those people up to that area with the firefighters," he said.
A number of people with disabilities work at the building and had to be carried down stairs by firefighters.
"Our concern was also the other people who couldn't make their own way out of the building, just to make sure they were assured the fire wasn't in fact in the building but was behind them in a substation," Mr Mann said.
An adjoining building at 600 Bourke Street was also evacuated, but power there has since been restored.
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