Rome, December 7 - Italian local administrators received 270 threats by mafia organisations in 2011, up 27% over the previous year according to a new report released on Friday. The figure translates into one act of intimidation every 34 hours. Of the 270 recorded incidents, 233 were aimed directly at a person and 37 were indirect, targeting public property, the report by Avviso Pubblico, an association of local and regional governments, showed. The largest number of mafia threats (31%) were recorded in the southern region of Calabria, followed by the islands of Sicily (25%) and Sardinia (13%). Administrators in the northern region of Lombardy were also targeted for the first time, with 9 cases reported. Seven cases were registered in Lazio, particularly in Rome province. This year 25 local administrations have been dissolved due to mafia infiltration, the highest number on record, according to the same report.