British bomb disposal experts blew up a suspicious vehicle outside the BBC World Service headquarters in central London early today but police said afterwards there had been a false alarm.
A Scotland Yard spokesman said the Metropolitan Police bomb squad carried out a controlled explosion on the vehicle outside the BBC's Bush House at 1.20 a.m. No bomb was subsequently found and the area was given the all-clear.
Another BBC building, the state broadcaster's complex in west London, was the scene of a car bomb explosion on March 4th which anti-terrorist police linked to dissident republican group, the Real IRA.
After the explosion, police chiefs warned of a possible new campaign of violence in the British capital and asked the public to be alert for suspicious devices.
The bombing resulted in a flood of false alarms around the capital, plunging transport systems into chaos and prompting a number of companies to step up security procedures.