Fire on Brisbane city rooftop put out

Fire crews have put out a rooftop fire in Brisbane's city centre.

Images of dark smoke spilling out of the 12-storey Broadway on the Mall building appeared on social media shortly after noon on Wednesday.

Half a dozen crews worked to extinguish the blaze.

Some crews remain on the scene to dampen down the site, which has been closed off for redevelopment since August last year.

A part of Adelaide Street remained closed on Wednesday afternoon.