Disgruntled Drivers Responsible for UK Letter Bombs?

A letter bomb exploded yesterday at the offices of the Drivers and Vehicle Licensing Agency in Swansea, South Wales, injuring a woman. It was the seventh such incident reported at a UK agency linked to traffic enforcement in the past three weeks, and the third in three days, according to an article in the Guardian. A total of six people have been injured so far, according to a statement issued just yesterday by police. 

Drivers angered by speed-monitoring cameras, some of whom refer to police vehicles carrying speed-detection devices as "the Talivan," have engaged in acts of sabotage in the past. The UK police have labeled such criminals as terrorists.

A  leader of one of the main militant groups opposed to speed monitoring and congestion pricing, Motorists Against Detection, denied that his group was involved in the letter bomb campaign. "We're not responsible for these attacks
and do not condone causing injury," said the man, who goes by the name "Captain Gatso." "However, there is a war against motorists and it seems this is an act of retaliation." His group's site features several photos of speed cameras that have been blown up, with approving captions. Another like-minded site, Roadracers, sports this photo of what appears to be a camera being detonated with pedestrians in the background. It's not clear where or when the photo was taken, or whether it is genuine.