Detectives in Britain have released CCTV footage of the man they suspect is the Ealing bomber and the moment the bomb went off.
The video shows the grey Saab packed with explosives stopping near traffic lights on The Broadway in Ealing, west London, at 11pm on Thursday - an hour before the blast.
A few minutes later the man police believe is the bomber is seen walking down The Mall towards Ealing Common.
Outside a shop he appears to brush past two men who police believe may have exchanged words with him.
The bomb suspect was in a dark short-sleeved shirt, darkish trousers, dark baseball cap with white motif on the front.
Deputy Assistant Commissioner Alan Fry, head of the anti-terrorist branch, said: "I would not expect anyone to be able to name the bomber from what we see here. I am hoping that it will trigger people's memories.
"This is not the breakthrough that we are looking for, that's still to come."
Mr Fry said police were investigating what kind of timer was used on the bomb.
PA