This is from the BBC news site:-
A fire at a derelict hotel in Newquay is believed to have been an arson attack, Cornwall's fire service says.
Emergency crews were sent to the four-storey former Cedars Hotel in the Mount Wise area at about 16:30 GMT on Wednesday.
About 30 people were evacuated from neighbouring properties which were affected by smoke in what police declared a major incident.
Residents were later allowed to return home. No injuries were reported.
Newquay station manager Stuart Whitworth said: "It's a derelict property and there's no power to it, so we can be fairly confident this is arson."