Al-Qaeda's second in command has warned that London will face more attacks because of Tony Blair's foreign policy decisions.
Ayman al-Zawahri's comments were made in a videotape broadcast on the Arabic television channel, al-Jazeera.
He stopped short of directly claiming responsibility for last month's bomb attacks against London's transport system, which killed 56 people.
At least two groups linked to al-Qaeda have claimed responsibility for the London attacks.
He also warned the United States that al-Qaeda will continue to launch deadly attacks until US troops leave all Muslim countries.
President Bush said these threats by Al-Qaeda showed that the 'war on terror' was now being fought there. He said the United States would not be deterred by the threats.
Abdurahman remanded on terror charge
The first person to be charged in connection with the failed attacks on the London transport network on 21 July has been before Bow Street Magistrates Court in the British capital.
Ismael Abdurahman, 23, of Kennington, southeast London, was charged under terrorism legislation with failing to disclose to police information that might have helped someone involved in terrorism.
He was remanded in custody to reappear in court in a week's time.
Meanwhile, an extradition hearing is to be held in Italy on 17 August for Osman Hussain, who was arrested last week in Rome on suspicion of being involved in the failed attack on London last month.
He has told Italian magistrates that he took part in the failed 21 July attacks but that he did not intend to kill. He has indicated he will fight extradition.
The British embassy said if all appeals were lodged, and all extensions taken, the extradition process should be completed by early December, but the process may be complicated if Italian magistrates decide to prosecute Mr Hussain.
Security operation continues in London
In London, another massive police operation is continuing today.
The operation comes four weeks to the day since the bus and underground rail bombings in which 56 died, and two weeks since a second series of attacks failed.
More than 6,000 police officers are on duty, many of whom are armed. The officers are patrolling stations and key sites.
