Drones with heat sensors are used to spot people infected with coronavirus walking around during lockdown in Italy

Italian police are using drones with thermal sensors to detect people with coronavirus out in public during the strict lockdown.

The small drone flies above virus hotspots such as Bergamo in the Lombardy region, measuring the temperature of those below.

It then tells residents to go home and can even be used to issue fines if they are seen to have a raised temperature. 

If a suspect is seen with a raised temperature, police on the ground will then approach and take a reading by hand.

The hovering drone emits a mechanical buzz reminiscent of a wasp and shouts down instructions in a tinny voice.

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An aerial image taken by a DJI Mavic 2 Enterprise drone equipped with a thermal sensor picturing a police officer and its instructor (to the right)

'Attention! You are in a prohibited area. Get out immediately,' commands the drone, about the size of a loaf of bread.

A heat sensor takes the offender's temperature and sends the information to a drone operator, who stares at a thermal map on his hand-held screen - shining orange and purple blobs.

'Violations of the regulations result in administrative and criminal penalties,' the drone says.

Italy's coronavirus epicentre in the northern province of Bergamo, in Lombardy, has had enough of people spreading COVID-19.

Matteo Copia, police commander in Treviolo, near Bergamo, said: 'Once a person's temperature is read by the drone, you must still stop that person and measure their temperature with a normal thermometer. But drones are useful for controlling the territory.' 

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The police officer and instructor seen in a drone image in a non-thermal image in Treviolo, in the Province of Bergamo

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Italy was the first Western democracy to enter a national lockdown in the face of a disease that has officially killed more than 18,000 in the Mediterranean country and nearly 100,000 worldwide.

It is now one of several European nations using police drones to an extent that would have seemed unimaginable - and almost certainly unacceptable - just a month ago.

Drones keep people off Paris's river quays and monitor water consumption in Spain.

In Italy, they try to figure out who has COVID-19.

The official death toll in Lombardy, an industrial area of 10 million people, stood at 10,022 early on Friday - meaning one in 1,000 people have died of the disease in a matter of weeks. 

The death toll appears to have peaked and the number of new daily infections is dropping to a point where Italy might soon start seeing the number of formally registered COVID-19 cases decline.

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Matteo Copia, Commander of the Treviolo municipal police which uses DJI Mavic 2 Enterprise drones equipped with a thermal sensor for checking people's temperature, pictured yesterday

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Police in Leicester use drones to make sure no one is around

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But health officials fear this progress may be undone once people have had enough of life under lockdown and start coming out into the spring sunshine.

Copia says the local police force has received new powers that allow it to check people's temperature without their knowledge or permission.

'Everything is perfectly legal,' the police commander said.

'At this moment of emergency, the Italian civil aviation authority has authorised us to control people using critical and non-critical operations.

'The critical operations involve city overflights.' 

The government in Rome is reportedly ready to let residents leave their homes for the first time in nearly two months on May 4.

But the most heavily hit regions might choose to extend their lockdowns and the Bergamo drones may keep flying well into the summer months.

Some Italians have had enough of the buzzing machines and their heat maps.

'The use of drones might seem positive but in my opinion, it's a privacy violation,' local student Carlotta Locatelli said.

But pensioner Regina Masper said the drones delivered a public good.

'I think it's good that they are using drones,' the pensioner said. 'At least we know who is infected and who is not.'