Police in Britain hunting the Ealing bombers have uncovered a bus ticket that could lead them to those believed to be behind the attack.
The ticket is thought to have a fingerprint belonging to a suspected bomber.
However, Scotland Yard say media reports that the print is that of a dissident republican are "speculative".
According to the Sunday Timesnewspaper, the print was found near the scene of an earlier attack in March when a bomb was planted outside the BBC Television Centre in London.
It is believed the attackers escaped into central London on a bus after leaving the explosive in a taxi parked outside the Shepherd's Bush studios.
The ticket is timed and dated to within an hour of the bomb being planted and was found in a skip full of rubbish from the bus.
The bomb went off as experts attempted to perform a controlled explosion.
Meanwhile the Chief Constable of the RUC admitted today to having "suspicions" about the identities of those responsible for the Ealing bomb.
Sir Ronnie Flanagan told the BBC he harbours suspicions, but said that was not enough to bring them to justice.
He appealed for the public's help in bringing the terrorists to justice.
"We certainly have suspicions but thankfully in a liberal democracy intelligence is not evidence," he said.
"The difficulty is of course that there are organisations and there are people in organisations that seek to exploit the freedoms in a liberal democracy.
"Therefore that is why it is of crucial importance that the public at large continually work in partnership with us.
"So yes, we have our suspicions, yes I have no doubt we will bring to justice those people, but to continually engage in that sort of success we need full public co-operation and understanding," he added.
PA