Devon and Cornwall Police have confirmed a woman resident at the property in Eastborne Road in St Austell has been arrested and is currently receiving treatment in hospital.
The property houses people with special needs and Cornwall Council is rehousing the displaced residents.
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A light breeze winds across the region, with clouds and rainy spells. There may be mist or fog in places.
Tonight will see light winds across the region, accompanied by cloudy skies, outbreaks of rain and mist and fog spreading north overnight.
Campaigners fighting the abuse chose Bristol bus station to try to educate the public on a growing problem.