Wednesday, April 21, 1999 Published at 09:36 GMT 10:36 UK
Police chase bomb appeal leads
Holdall clue: A sports bag like the one which contained the bomb
Police say they have had a "tremendous" response to a televised appeal for help to catch the Brixton nail bomber - and that a prime suspect has emerged.
Scotland Yard asked the public on Tuesday's BBC One's Crimewatch UK programme for information about Saturday's bombing, which injured 48 people.
Callers to the show told police about people in the area at the time of the attack, and gave information about the nails used in the bomb.
One caller reported people, equipped with binoculars, on a rooftop.
The explosion, in the south London borough's Electric Avenue, has been comdemned by the government.
Among the victims was a 23-month-old baby, who was sent home from hospital on Tuesday after having a nail removed from his head.
The boy is expected to make a full recovery, but 10 people remain in hospital and there are fears that two of the most seriously injured may be blinded.
On Monday a man saying he was from the extreme right-wing group Combat 18 rang police and claimed to have planted the bomb.
But police are treating the call with "extreme caution".
The Metropolitan Police's Deputy Assistant Commissioner Alan Fry warned Crimewatch viewers they should not discount anyone they suspect simply because they did not hold right-wing views.
"This person may be a renegade member, and someone on the fringe of the group may know who has done this act. Or it could be a loner," he said.
"If you know of anyone who has recently been acting suspiciously and out-of-character, reading literature on bomb making, or maybe even buying large amounts of nails and a sports bag, we would ask you to contact us.
"I have no doubt this person would have experimented and detonated devices before this act."