An official probe has been launched due to rising thefts amid reports that criminals see the NHS as an 'easy target'.

Stating that health service has to be open to public the NHS Security Management Service believes the health service is in danger of thefts.

Thieves have been snatching everything from a mobile scanner unit, ambulance satellite navigation systems, patients' belongings and even laughing gas, a trend described as a real problem by security chiefs.

There have been 57 high-value claims, those worth more than £20,000, over the past five years according to figures.

Among the recent thefts were a mobile scanner unit taken by thieves in Corby, Northants, earlier this month, causing delays for around 70 patients.

Security chiefs have asked every trust in England to give them details of thefts to find out a solution.

Jill Abethell, who is overseeing the investigation for the security service, said, "We have decided to look at theft as we believe it is a real problem. We want to find out more so we can look to see if measures can be taken to protect property."

Jonathan Fox, of the Association of Professional Ambulance Personnel, said, "I am afraid it does happen. In many ways the NHS is an easy target. But in the case of ambulances, every time there is a theft that vehicle has to be taken off the road and that means patients are put at risk."