Paramedics attended Horfield Common after a man fell ill.
A South Western Ambulance Service spokesman said paramedics were called to the park on Filton Road at about 5.30pm on Monday (April 20).
He said: "We treated an unwell patient and took him to hospital for further care."
The spokesman added it is "not thought" this was a case of coronavirus.
Pictures taken shortly before 7pm on Monday show a paramedic in a protective suit and mask assisting the patient.
The patient was wearing a face mask and sitting on the grass of the common.
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