There was a large emergency services presence Cardiff city centre on Wednesday night with a cordon in place as one of the main routes through the capital was closed.
Part of St Mary Street was closed in both directions due to a "police incident" with firefighters called to what was initially described as an "explosion".The road was closed from Wood Street to Mill Lane.
Photos from the area showed several fire service and police vehicles and there was a cordon in place near the Brewery Quarter though the cordon came down just before 8.45pm.A spokesman for South Wales Fire and Rescue service said they received a call at 7.06pm to initial reports of an "explosion".
However they said when crews attended this was not the case but could not share any more detail of the nature of the incident.