That's a good question.
I just looked at about 5 pages of posts and can't find the snippet I was looking for.
IF I RECALL CORRECTLY, 2 different men were detained and 1 was released.
IT IS UNKOWN IF IT WAS RELATED TO YESTERDAY'S BOMBING ATTEMPT.
A repost here from another thread regarding the second London bombing attempt:
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Posted by BurbankKarl to Cindy
On News/Activism 07/21/2005 11:48:08 PM PDT · 2,438 of 2,450
A man spoke of the terrifying moment when he came face to to face with one of the suspected suicide bombers at Shepherd's Bush.
Business analyst Abisha Moyo said he heard a bang like a "pistol going off" and saw a fellow Tube passenger lying on the floor of their carriage.
He approached him and asked "are you all right, mate" but was then stunned to see the man was lying on top of a rucksack with smoke coming out.
The suspect then calmly left the rucksack behind, jumped on the tracks and walked away down the line, said Mr Moyo.
http://www.itv.com/news/britain_1689947.html