Oct. 14 (UPI) -- Three Italian police officers were killed and at least 13 injured in a gas blast early Tuesday as they attempted to carry out an eviction at a farmhouse near Verona in the north of the country.

The residents, two men and a woman, all related, were arrested in connection with the incident in Castel d'Azzano, which provincial police commander Claudio Papagno said appeared to be deliberate after gas inside the property was ignited as the officers broke down the door.

"Upon entering the house, we were confronted with an act of absolute madness. A gas cylinder had been ignited, and the explosion directly hit our officers," said Papagno.

The officers killed were members of the Carabinieri military police, but state police and a firefighter were among those injured.

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