Let's not forget that there were Muslim victims on 9/11 and in the London attacks.

But they said it remained unclear what role Al Qaeda played in the London attack.

A timed detonation system is believed to have been used in the London attacks.

"MI5 tracked everyone involved in the London attacks," the official said.

Investigators, though, lean toward the theory that the London attacks were the work of terrorists already in Britain.

Two investigators said they were trying to determine if he had any connection to the men responsible for the London attacks or their associates.

The "working assumption," one official said, is that the same kind of explosives were used in the London attacks.

On the record, officials caution against jumping to conclusions about Pakistan's role in the London attacks.

Even with the London attacks, there is little indication that this view is changing.

The second is at Starfleet itself, during a high priority meeting held in response to the London attack, using a small armed shuttle.