VIDEO: Mysterious plume of steam spews from the ground in Sheffield city centre
The plume is next to Arundel Gate Interchange on Norfolk Street, a few metres away from the Crucible Theatre.
The area has been fenced off with signs on metal barriers reading 'Danger Keep Out' and 'Deep Excavation'.
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Hide AdThe Star has been told the steam has been billowing out of the ground for more than a week.
The cause is being investigated.
Sinkholes caused havoc in Sheffield earlier this year. A section of Hutcliffe Wood Road collapsed without warning in April and a steaming hole appeared outside Pond Street Interchange in May.