Police hunt angle grinder ticket machine thieves
10 June 2014 Last updated at 16:04 BST
Officers are seeking a gang of thieves who caused more than £100,000 of damage to ticket machines at railway stations across north London and Hertfordshire.
Since April, ticket machines at six stations have been targeted by a group using an angle grinder and a pickaxe.
British Transport Police said the men had also stolen more than £3,000.
BBC London's Transport Correspondent Tom Edwards spoke to Det Insp Chris Neeson from British Transport Police.