The group had been placed under investigation following complaints filed by associations of COVID-19 victims' relatives, consumers and some trade unions over their management of the early days of the pandemic in and around the northern city of Bergamo in early 2020.

They had been accused of negligently causing a massacre after a prosecutor's report said more than 4000 deaths could have been saved if the initial red zone had been extended from Bergamo to outlying areas including another two towns.

They were under investigation for culpable epidemic and manslaughter after complaints envisaging "inefficencies and delays by the government in the adoption of organizational and restrictive measures necessary to tackle the COVID emergency".

“It is impossible to attribute anything to government representatives,” the court said.

“It is not possible to hypothesize and identify a violation of general or specific precautionary rules in the work of the Government in the period taken into consideration by the complaints."

The ex-prime minister and ministers accused microbiologist Andrea Crisanti, the expert who drew up the prosecutor's report, of being biased.

ANSA