A Pakistani link is becoming clear. From the TimesOnline, :
STARING confidently ahead as he arrives in Pakistan for what is believed to be a rendezvous with the mastermind who plotted the London attacks, one of the bombers, Mohammad Sidique Khan, hands his British passport to immigration officials.
Behind him in the queue of arrivals at Karachi airport is Shehzad Tanweer, 22, who told his family he was heading for a religious school.
Instead intelligence officials discovered the pair were picked up from the airport on November 19 last year and driven to a comfortable hotel in the business district of Karachi where they stayed for a week.
Immigration officials said that the third man from Leeds, Hasib Hussain, 18, had turned up in the same city five months before his colleagues.
Police toured hotels and restuarants with pictures of the men to discover who they met. Investigators are also trying to verify claims that all three slipped into Afghanistan during their trip to plan the attack on the London Underground.
Pakistani authorities have told The Times they know the identity of the British-born mastermind whom the British authorities are desperately trying to track down. “We believe this is where they could have met their mentor,” one Pakistani security source said. “They did not appear to go to where they told their families they were heading, and they have no obvious connection to Karachi, which was the centre of previous al-Qaeda operations.”
The trio avoided the tourist hotels in the city and settled for a three-star guesthouse in the Saddar commercial district, before moving on to Lahore and Faisalabad. Police want to know who paid their hotel bills.
One of the militants arrested by Pakistani police in connection with the London attacks is a suspected bomb-making expert for an outlawed terrorist group. Qari Usman, who has been linked to the plot to assassinate Pervez Musharraf, the Pakistani President, in 2003, is alleged to be part of the banned Jaish-e-Mohammad group. Some of its members were in contact with some of the British bombers this year. Mr Musharraf condemned the London bombings as “UnIslamic” and admitted some religious schools had terrorist links….