article_snippet.sent: Authorities say that the robberies, most recently on April 10 (pictured), have become increasingly violent, with the thieves threatening kidnappings and saying the thieves will shoot police if engaged .
article_snippet.sent: Authorities warned that the criminals have become increasingly aggressive and violent during robberies on January 24, February 21 and April 10.
highlights_snippet.sent: Thefts are becoming more violent, robbers have threatened kidnapping .