Britain has said none of those arrested in recent raids in Pakistan were suspects in the July 7 London bombings.
In a speech the UK’s senior diplomat in Pakistan, Mark Lyall Grant, contradicted media reports to that effect.
“These attacks were not carried out by foreign states, they were carried out by British individuals. And let me take this opportunity to clarify that there have not been any arrests in Pakistan since 7 July related to the London bombings,” he said.
In the past week Pakistani security forces have detained around 300 people suspected of involvement in Islamic extremism.
In a televised address President Pervez Musharaff said Pakistan had a problem with terrorism within its borders but added that Britain faced similar challenges.
He pointed out that while three of the suspected London bombers were of Pakistani descent they were born and brought up in the UK.
Musharaff also announced new tighter controls on some Islamic religious schools which authorities fear may be recruiting grounds for extremist organisations.