Fire rages through Sydney Olympic Park venue

Firefighters attend a building fire at the Sydney Olympic Park precinct. Photo / AAP

A large fire has broken out at Sydney Olympic Park and ravaged an official sporting venue used in the 2000 Olympic Games.

The Monster Skate Park on Showground Rd in Homebush, the site of the 2000 Sydney Olympics, was earlier engulfed by fire as more than 12 emergency service crews and 80 firefighters battled to contain the blaze.

Plumes of dark smoke could be seen billowing from the building, next to ANZ Stadium, will host the Wests Tigers and South Sydney NRL game tonight.

The fire has since been contained, according to the NSW Fire Service.

There were reports of a "loud bang" before the venue went up in flames around 2.30pm.

One witness, who asked to remain anonymous, told news.com.au that workers on the roof of nearby ANZ Stadium rushed to the skate park to "get some young people out".

"It was all very dramatic and there were fire engines everywhere," the source said.

"We don't know if anyone has been hurt."

Nearby sports halls were also evacuated.

One man in his 30s was treated for mild smoke inhalation on the scene before he was taken to Concord Hospital as a precaution. News.com.au understands no one else was injured.

Another witness told news.com.au the fire looked like it was "definitely high in the roof" of the Monster Skate Park complex, which was used as an official sporting venue during the Sydney Olympic Games.

Anyone know whats happening at #SydneyOlympicPark pic.twitter.com/dE1JMZLr5f

— Regi Harbron (@regih85) May 12, 2017

Massive fire at Olympic Park @7NewsSydney pic.twitter.com/mKgXUQNidy

— Iggz (@adnyana179) May 12, 2017

A NSW Fire Service spokeswoman told news.com.au the blaze has been categorised as a "sixth alarm, which is rather large".

"We have 12 fire crews on the scene with more on the way," she said earlier today.