Armed police armed Marsh Farm, Luton
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Armed police units patrol Luton estates

16 May 2013 Last updated at 11:18 BST

Four extra armed response units have been introduced on two troubled estates in Luton where police anticipate "further violence".

Bedfordshire Police said there would be an increased presence in the Marsh Farm and Lewsey Farm estates after the recent spate of shootings related to gang tensions in the town.