Authorities have arrested 43 alleged members of two feuding gangs in Brownsville, Brooklyn some of whom police say boasted about their shootings on Twitter.

Police Commissioner Ray Kelly said Thursday that police used social media messages to link alleged gang members to six killings, 32 shootings, 36 robberies and numerous other crimes. The average age of those arrested was 17.

"Gang members made the mistake of boasting on Twitter which NYPD officers used to help establish their complicity in murder and other crimes," Kelly said.

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