An angry motorist was feared to be behind a letter bomb campaign which yesterday saw a second attack in as many days on companies linked to motoring fines.
The latest blast happened yesterday morning when a package exploded at the offices of an accountancy firm tied to Speed Check Services, the provider of digital speed cameras to the police.
Two men suffered blast wounds to their hands and upper bodies in the explosion at the offices of Vantis on an industrial estate in Wokingham, Berkshire. It followed Monday's letter bomb attack at the central London offices of Capita, which runs London's congestion charge system. That bomb, in a Jiffy bag, exploded in the hands of a postroom worker. She is still receiving hospital treatment.
Scotland Yard's counter- terrorism unit and Thames Valley Police are trying to establish whether there are any links between the explosions.
A Scotland Yard spokesman said: "The Metropolitan Police Counter Terrorism Command is aware of an incident in Wokingham and we are liaising with Thames Valley Police.
"It is too early to speculate on whether the incidents are linked."
Bomb disposal officers and detectives spent yesterday at the scene of the Wokingham incident, where 15 staff were evacuated from the Vantis offices and a cordon was put in place to ensure public safety. The Thames Valley force is also looking to see if there is any connection to three letter bombs sent to companies in Oxfordshire and the West Midlands area last month.
In each case, the companies received an A5 Jiffy bag containing a crude firework-type explosive device.
Thames Valley Police said it was "too early" to say whether there was a link between these incidents and the latest explosions. A spokesman for Vantis said the two injured men were left shocked by the blast, but did not need hospital treatment. They were treated for blast injuries to their hands and upper bodies.
The spokesman added that the package did not appear to have been targeted at Vantis.
It is understood to have been addressed to a different company.
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