Penne – At least 25 people, including several children, were feared dead on Thursday after a devastating avalanche buried an Italian mountain hotel under snow and mud.Rescue work continued into the night but the prospects of anyone being rescued alive from the ill-fated Hotel Rigopiano looked bleak, with rescue efforts hampered by heavy snow that had blocked access roads to the remote site.The hotel was engulfed by a two-metre high wall of snow late on Wednesday afternoon with the impact powerful enough to rip the three-storey building from its foundations and move it 10 metres."We're holding on to hope that there are survivors inside," Deputy Interior Minister Filippo Bubbico told reporters in the town of Penne, where a camp for rescue workers has been set up."Firefighters and alpine rescuers are working tirelessly and now the army is doing everything to improve access to the route," he said.Special army mountain rescue teams were seen riding in vehicles with caterpillar tracks."A small avalanche has created a wall of snow across the path to the hotel, we are heading up there now to knock it down," said army Major Nicola Cappozolo."We're preparing for another long night but as long as there is hope of finding survivors we'll be there."The first rescue workers only reached the remote site in the early hours of Thursday and it was midday by the time a snow plough and the first mechanical excavation equipment got there.Two bodies were extracted from the rubble and two survivors were taken to hospital suffering from hypothermia.Italian broadcasters showed images of piles of masonry and rubble in the entrance area of what they dubbed a "coffin hotel".Wife and children missingThe region was hit by four seismic shocks measuring above five-magnitude in the space of four hours on Wednesday, when at least one person was confirmed to have died. Quake experts said the tremors almost certainly triggered the snowslide.The hotel's guests had been assembled on the ground floor awaiting an evacuation following the quakes that was delayed by snow-blocked roads when the avalanche struck.Local officials confirmed two guests who were not inside when the avalanche struck had been rescued.One of them, identified as Giampiero Parete, 38, was quoted by friends in Italian media as saying his wife and two children, a girl aged six and a boy aged eight, had been inside the hotel.Officials said there had been between 20 and 22 guests staying and seven or eight staff on duty at the hotel on the eastern lower slopes of the Gran Sasso mountain. It was unclear if there were any additional people in the hotel.The first mountain police on the scene got there by helicopter around 03:00 (GMT) with others following on skis.They reported no signs of life inside the building and one of their commanding officers told reporters: "There are many dead."Ambulances were blocked for hours by two metres of snow in the nearest village, Farindola, some 9km away, according to the civil protection agency.Fears for some local familiesThe hotel, a four-star establishment with its own spa and indoor pool, was located at an altitude of 1 200 metres, around 90km east of the epicentres of Wednesday's earthquakes. They were also centred near Amatrice, the town devastated in an August quake in which nearly 300 people died.A region dominated by Gran Sasso, a majestic 2 912-metre peak, has numerous small ski resorts popular with day-trippers from Rome and urban centres on Italy's east coast.The one person confirmed dead on Wednesday was a man found buried under the debris of a building in Castel Castagna, a small town to the north of Farindola.The quakes affected an area that straddles the regions of Lazio, Marche and Abruzzo which is home to many remote mountain hamlets.Although many residents had been evacuated from their homes after last year's quakes, there were fears for families who had decided to stay and are now cut off.Guido Castelli, the mayor of the Marche town of Ascoli said his staff were trying to check on around 1 000 people in cut-off hamlets.Schools in the affected region have been closed until next week to allow structural safety checks to be carried out.Italy is prone to earthquakes but has rarely suffered so many in quick succession.Since the Amatrice disaster, there have been nine shocks measuring more than a five-magnitude and a total of 47 000 registered aftershocks.Italy straddles the Eurasian and African tectonic plates, making it vulnerable to seismic activity when they move.