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After more than 100 vehicles and offices were attacked in southern Santa Catarina province in the past 30 days...the army has been sent in.
Nearly 40 buses and trucks have been torched there...and bus drivers agreed to only limited trips.
Officials speculate that the violence is gang related...over alleged prison abuses.
Over 90 arrests have been made since January.
http://www.bbc.co.uk/news/world-latin-america-21480282
