British security services have thwarted September-11-style terror attacks on the Heathrow Airport and skyscrapers in London's Canary Wharf financial district, according to media reports released Tuesday. The plot to hijack planes and crash them on the two British targets was masterminded by terrorists linked to al-Qaeda, according to ITV News and the Daily Mail. Security services have disrupted training programs for suicide pilots, ITV News said. British officials have refused to comment on the reports. CNN cited a spokesman at Prime Minister Tony Blair's Downing Street office as saying: "We never comment on security matters."