Three members of law enforcement lost their lives and at least 15 people were hurt in an apparently premeditated detonation from gas at a country home in northern Italy.
The blast was triggered as law enforcement and fire personnel approached the house close to Verona to enforce an eviction order for two brothers and a sister aged in their 50s and 60s.
The three victims who died belonged to the Carabinieri force.
A man and a woman were taken into custody at the location and a third person who ran away after the explosion was found shortly later. The trio have been admitted to the hospital.
The detonation could be audible some 5km (3 miles) away and photographs from the scene revealed the structure left as a heap of debris.
“We are in a period of mourning,” said the Interior Minister Matteo Piantedosi, who added that attempts had been made to evict the brother and sister trio in the past.
The leader of the Veneto region, the regional head, explained the residence was facing an eviction order due to unpaid amounts incurred by the property owners.
Negotiators had been sent to speak to the brothers and sister who had secured themselves into the home. When the officers came shortly after 03:00 (01:00 GMT), authorities believe a family member caused the detonation.
“When we entered the property, we faced an utterly insane act,” regional commander the police commander told the media.
“A gas cylinder had been ignited, and the blast precisely impacted our personnel,” he added.
Incendiary devices were also located at the property, the interior minister confirmed.
Injured individuals by the explosion included eleven more officers of the Carabinieri as well as three members of national police and a firefighter.
Based on information from the Verona prosecutor, the property was in a poor condition and had was without power.
He was convinced the blast had happened on a floor above the access point and stated to the press it was a “intentional and planned killing”. Shortly before the explosion, he mentioned members had “heard a whistle, likely the gas canisters being opened”.
“We all knew the situation was dire,” neighbors informed local news, noting that the three had earlier warned to “blow themselves up” rather than leave the house.
“The incident exacted a ‘dreadful, extremely sad and dramatic price’.”
The Defense Minister Guido Crosetto united with other government officials in commemorating the three officers who had died in the performance of their duties.