Pakistani authorities investigate why London suicide bombers travelled there last year

THREE of the four suspected suicide bombers in the July 7 attacks in London travelled to Karachi in southern Pakistan last year, an immigration official said yesterday, as authorities tried to determine whether extremists in Pakistan had aided the deadly attacks.

Shahid Hayyat, a deputy director at the Federal Investigation Agency, said one of the men arrived in Karachi in July 2004, though details of when he left the country were unclear.

Two other men arrived in the same city on November 19 and returned to London in February this year, according to Mr Hayyat.