Italy's Prime Minister Matteo Renzi has promised to rebuild "all the homes, churches and properties destroyed in a string of earthquakes over the past two months".
Mr Renzi was speaking on Sunday just hours after another powerful quake hit the centre of the country.
We will rebuild everything, the houses, the churches and the businesses. Everything that needs to be done to rebuild these areas will be done.
Several people were hurt during the latest tremor on Sunday and emergency services reported widespread damage, but no deaths.
One person has been seriously injured in the strong earthquake that hit central Italy.
Several others have also been hurt in the 6.6 magnitude tremor and hundreds are believed to have been left homeless.
Civil Protection chief Fabrizio Curcio said: "No deaths have been reported, but there are a number of people injured."
The powerful earthquake that struck central Italy on Sunday saw people running from collapsing buildings.
The quake measured 6.6 according to the US Geological Survey and was centred close to the Umbrian town of Norcia.
The strong tremor badly damaged the historic Basilica of St. Benedict. Nuns and priests were seen being helped by firefighters as they sort safety in the town square.
The emergency services were checking to see if there were any casualties, said civil protection authorities.
An earthquake measuring 6.6 magnitude has struck central Italy, according to the US Geological Survey.
The earthquake has brought down several buildings.
There are no immediate reports of fatalities, but a number of people have been injured, including one seriously.
According to the USGS, the quake was centred 68 km east southeast of Perugia and was 108 km deep.
Italy has been struck by two earthquakes within hours of each other.
The quakes are aftershocks from the earthquake which killed 300 people in the same area in August.
Both struck near the central Italian city of Perugia with tremors felt as far away as Rome, some 145 miles south-west.
The first quake measured 5.4 on the Richter scale but the second, stronger quake measured 6.4.
Officials in the town of Visso, not far from the epicentre, reported several injuries.
Several churches dating back to the 15th century collapsed or were damaged.
Some residents said they were without power as night fell.
The epicentres of both quakes were near the town of Castelsantangelo sul Nera in the Marche region.
Given the size, depth and location of the quakes, the US Geological Society estimates about 12 million people likely felt at least weak shaking.
This original quake was about 12 miles north-west of the original shock, which puts it on the northern edge of the aftershock sequence and two months is normal for aftershocks.
The August 6.2 quake was five times bigger than Wednesday's and was 11 times stronger based on energy released.
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A state funeral has been held for victims of a powerful earthquake that hit Italy on Wednesday as the country held a day of national mourning for all those who lost their lives in the tragedy.
Despite suffering their own injuries crowds of people gathered to pay their respects and show support for each other in the midst of the ongoing national emergency.
ITV News Correspondent Emma Murphy reports.
The number of people killed in Italy's earthquake has risen to 290 as the country holds a national day of mourning.
A state funeral attended by Prime Minister Matteo Renzi has been held in the city of Ascoli Piceno for 35 of the victims.
Search and rescue operations are continuing but have been hampered by hundreds of aftershocks since the 6.2-magnitude earthquake struck on Wednesday.
Italians are paying their respects to the victims of Wednesday's powerful earthquake on a day of national mourning.
At least 281 people died and around 400 remain injured in hospital after the 6.2-magnitude earthquake caused hundreds of buildings to collapse.
Search and rescue operations are continuing but have been hampered by hundreds of aftershocks.
President Sergio Mattarella has visited Amatrice, one of the worst-affected towns, where the majority of the casualties occurred.
A state of emergency has been declared in the affected towns.