A man has been arrested on suspicion of attempted murder after a member of staff was stabbed in a hospital.
The Royal Sussex County Hospital in Brighton was put into lockdown after the incident this morning.
Sussex Police said the "apparently isolated and unexplained incident" is not being treated as a terror attack.
"There is currently nothing to suggest that any other person has been involved or that anyone else is at risk," the force added in a statement.
Officers have been working with security staff to make sure that staff and patients are safe.
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