"The bizarre phenomenon, which has seen a sudden surge this year, includes spontaneous combustion of mattresses, beds, cars, and devices like fridges and mobile phones, even when switched off."
Links:
http://www.odditycentral.com/wtf/italian-village-plagued-by-mysterious-fires-has-been-puzzling-scientists-for-years.html

http://www.ibtimes.co.uk/italy-mystery-fires-sicily-village-blamed-aliens-1458825