America is refusing to accept assurances from Tehran that it is not developing nuclear weapons or harbouring al-Qa’ida suspects. The White House remained concerned that members of the terror network had taken refuge in Iran with the knowledge of some elements of the Iranian regime, Ari Fleischer, President George Bush’s spokesman, said yesterday, in comments that marked a further souring of relations with Iran. Washington had previously said it believed those agents were behind the bomb attacks in Saudi Arabia that killed 34 people. But Donald Rumsfeld, the Defence Secretary, issued the starkest of warnings to Iran declaring that the allies would not permit some “new form of tyranny” to replace Saddam’s regime in Iraq. Full Story