PART of a derelict building has collapsed into a major Southampton road.

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Police have shut Cumberland Place after rubble from Grosvenor House, which is due to be demolished, fell into the road during the collapse, at around 11.30am, knocking scaffolding.

Officers have put diversions in place to allow recovery workers and structural engineers to assess the building, near the Grosvenor Square multi-storey car park.

It is not thought anyone was injured in the collapse.

Sue Harrison, who was working in an office opposite, saw the collapse. She said: "It was a real shock. There was a huge cloud of dust. We were all sure the whole building was going to come down.

"It could have ended in complete tragedy."

Police have warned that the road could be closed for up to two days as a result of the collapse.