Two of Vantis Plc's employees have been injured by a small explosion in the accountancy firm's Wokingham office, according to a report from Reuters news agency.
Their injuries were minor and Thames Valley Police are handling matters. Further press reports suggest that a letter bomb was the cause of the blast.
Two days ago, a mail bomb went off in the offices of Capita, the company which administers the Congestion charge. An employee was injured and she is still receiving treatment.
There is speculation in some quarters that the bombing "campaign" is the work of a disgruntled motorist, even though Vantis have no connection with Capita.