A man shot dead by police hunting the bombers behind Thursday's London attacks was unconnected to the incidents, police have confirmed.

The man was killed in Stockwell Tube station in an incident described by Scotland Yard as a "tragedy".

Two other men have been arrested and are being questioned after bombers targeted three Tube trains and a bus.

Police have also raided a house in Streatham Hill, south London, in connection with the failed attacks.

'Horrendous consequences'

A Scotland Yard statement read: "We believe we now know the identity of the man shot at Stockwell Underground station by police on Friday 22nd July 2005, although he is still subject to formal identification.

"We are now satisfied that he was not connected with the incidents of Thursday 21st July 2005.

"For somebody to lose their life in such circumstances is a tragedy and one that the Metropolitan Police Service regrets."