British Prime Minister has called on Islamabad to do more to root out terror after 10 Pakistani nationals were arrested in the U.K. for allegedly planning a very, very big Al-Qaida-inspired terror attack though no specific targets were mentioned, reports say.

Bolstering Brown's earlier assertions during the G-20 summit that most of the persons plotting terror attacks in his country come from Pakistan--the epicenter of Islamic terrorism--the British police arrested 12 persons including 10 Pakistani nationals who came to the country on student visas in raids in north-west England.

Home Secretary Jacqui Smith hailed the raid as a successful anti-terrorism operation and said Britain continued to face a severe terrorist threat.

The arrests came in raids Wednesday which were hastily brought forward after top anti-terror chief, Scotland Yard's Assistant Commissioner Bob Quick was photographed Wednesday as he arrived at Downing Street for a meeting with the Prime Minister and the Home Secretary clutching sensitive documents on which details of the undercover operation--codenamed Pathway--in north-west England could be seen.

Police confirmed 10 of the men arrested in Manchester, Liverpool and Clitheroe under the Terrorism Act were Pakistani nationals, prompting Brown to call on Islamabad to do more to root out terror. They arrested persons ranged in age from a teenager to a 41-year-old man.

We know that there are links between terrorists in Britain and terrorists in Pakistan, the premier said. That is an important issue for us to follow through and that's why I will be talking to President (Asif Ali) Zardari about what Pakistan can do to help us in the future.

However, Pakistan's high commissioner to Britain, Wajid Shamsul Hasan, tried to disassociate Islamabad's role in the terror plot.

Expressing shock and surprise at the alleged plot's link to his country, he said Pakistan had been working hard to combat terrorism within its borders, and noted that many of those arrested were reportedly in Britain on student visas--saying issuing these was Britain's responsibility.

If they (British authorities) allow us to make inquiries first, if they ask us to scrutinize those who are seeking visas, we can help them, he said.

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