Tourists more than 100 miles away from the epicentre of an earthquake that has hit central Italy were woken by the tremors.
The magnitude 6.2 quake had its epicentre in Norcia in Umbria, about 105 miles north east of Rome.
At least 10 people have been reported dead in two towns which were partially demolished - the hardest-hit places were Amatrice and Accumoli, near Rieti. These towns are some 50 miles north east of Rome.
Sarah Conrad works for YouTube in London and is visiting Rome. She said she was woken up in the early hours and also felt aftershocks.
A number of other tourists have been tweeting about what it felt like to experience an earthquake.
The mayor of Amatrice, Sergio Pirozzi, told state-run RAI radio and Sky TG24 that people were buried under collapsed buildings.
He said the lights had gone out and heavy equipment was needed to clear streets covered with debris.
"The town isn't here anymore," he said.