Italy rescuers found 6 survivors of Rigopiano avalanche tragedy .
Six people have been found alive in Italy's Rigapiano hotel, two days after it was buried in an avalanche.
Rescuers said the six survivors had been discovered buried under snow, but had not yet been extracted.
They have now requested rescue helicopters to help with the efforts, Italian media reported.
At least four people have been confirmed dead, and about 20 are still missing, as the rescue effort continues in difficult conditions.