A LETTER bomb exploded at Britain’s vehicle licensing agency yesterday, injuring three women, in a spate of attacks targeting motoring-related groups.

Police chiefs issued a public warning about a letter bomb campaign to workers across the country today after it emerged that seven explosive devices have been posted in the last three weeks.

A woman was injured today when a letter bomb exploded at the DVLA’s main centre in south Wales – the third attack on motoring-related companies in consecutive days.

FEARS that an enraged motorist could be mounting a letter bomb campaign heightened last night after a second attack in consecutive days on companies linked to the administration of motoring fines.