The employees were challenged after inconsistencies were picked up in the machines at Queen Alexandra Hospital in Cosham.
A spokesman for Portsmouth Hospitals NHS Trust said: ‘Following an investigation in to anomalies from car park ticket machines at Queen Alexandra Hospital, two members of staff were challenged.
‘These individuals have since resigned from their roles. Hampshire Constabulary have been informed and are investigating. It would be inappropriate to comment further while an investigation is ongoing.’
The amount of cash taken and the period of time in which the offences occurred has not been revealed.
A police spokeswoman said: ‘I can confirm that we were contacted at 6.58pm on May 10 with a report that cash boxes had been stolen from car parking machines at Queen Alexandra Hospital.
‘We are investigating. No arrests have been made.’
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