Tests for coronavirus on two British prisoners have come back negative, it has emerged.
The inmates fell ill yesterday, with one reportedly collapsing in his cell at HMP Bullingdon in Bicester, Oxfordshire.
The wing shut off as a result of the scare and will remain closed for a further 24 hours at least.
One of the lags had recently been transferred to the Category B and C prison from a jail in Thailand, it was understood.
A source said: "Prisoners will remain in their cells for the duration and will be fed food on plates pushed through their door hatches.
"He is being treated at a specialist hospital outside the prison. The two other prisoners were displaying flu-like symptoms and are in Bullingdon’s hospital wing."

"He is understood to have recently arrived at Bullingdon from a jail in Thailand under a transferral scheme."
A nurse at HMP Bullingdon who helped treat the inmates has self-isolated as a “precaution”, it is reported.
Public Health England (PHE) officials in hazmat suits were spotted at the prison yesterday.
But PHE said it does not comment on suspected cases and said it would only give an announcement "if and when a case is confirmed".

And so far, aftere this scare, all confirmed cases have been in York or Brighton, East Sussex.
A man dubbed the "super spreader" Steve Walsh, from Brighton, yesterday said he had recovered and his thoughts were with others diagnosed with the virus.
He's since recovered, the NHS confirmed.
However, schools, universities and other institutions say they remain vigilant.
University of Bath, for instance, confirmed someone linked to the institution is in self-isolation awaiting the results of a test for the virus.
"A member of the University community is being tested for coronavirus as a precaution," a statement read today.