They also called for efforts to ensure organized crime doesn't infiltrate lucrative construction contracts to eventually rebuild much of the picturesque towns leveled in the disaster.
Meanwhile, rescue workers pressed on with the task of recovering bodies from the rubble, with hopes of finding anymore survivors virtually vanished four days after the powerful quake.
Over the past two days, they found six more bodies in the rubble of Hotel Roma in Amatrice, the medieval hill town in mountainous central Italy that bore the brunt of destruction and loss of life in the powerful quake.
The quake that struck before dawn Wednesday also injured nearly 400 people as it flattened three medieval towns near the rugged Apennines. Prosecutor Giuseppe Saieva, based in the nearby provincial capital of Rieti, said the high human death toll "cannot only be considered the work of fate."
More From This Section
"The fault lines tragically did their work and this is called destiny, but if the buildings had been built like in Japan they would not have collapsed," Saieva said in comments carried by Italian media.
With schoolchildren's summer vacations in their final weeks, the school wasn't yet in use. Many were shocked that it didn't withstand the 6.2 magnitude quake.
After an entire first-grade class and a teacher were killed in a 2002 quake in the southern town of San Giuliano di Puglia, Italian officials had pledged citizens that safety of schools, hospitals and other critical public buildings would be guaranteed.
Questions also surround a bell tower in Accumoli that collapsed, killing a family of four sleeping in a neighboring house, including a baby of 8 months and a 7-year-old boy.
Italy's national anti-Mafia prosecutor, Franco Roberti, also vowed to work to prevent organized crime from infiltrating public works projects which will be eventually begun to rebuild the earthquake zone.