We are working with our multi-agency partners to look into concerns raised about the care of an elderly resident at a care home in Wraxall, North Somerset.
Officers from the public protection team are working closely with North Somerset Council adult social services."
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Residents living within 100m of Reeco Fernandez's property were advised to leave their homes and had to stay away for five days.
Laura Harris, 42, does not expect to see her 43rd birthday without the treatment named Bevacizumab, which costs £21,000.
A hospital in South Devon was put on major alert this evening. Police were called to the site in response to "a threat".