LONDON (Reuters) - British police said the three bomb attacks on London Underground trains on Thursday morning occurred almost simultaneously and were more likely to have been triggered by timing devices than suicide bombers.
"All three bombs on the London Underground system actually exploded within seconds of each other at around 8:50 in the morning," Scotland Yard deputy assistant commissioner Brian Paddick told a news conference on Saturday.
"Bearing in mind these were almost simultaneous, we think within 50 seconds of each other, maybe that lends more toward timing devices more than people actually with the bombs, manually detonating. But we are not ruling out either of those possibilities."
Police had previously thought the three blasts were spread over nearly half an hour, but revised their information in the light of new technical data and witness statements, he said.
A fourth bomb went off on a bus near King's Cross station at 9:47 a.m. Altogether more than 50 people were killed in the worst peacetime attacks in the British capital, which officials say carry the hallmarks of al Qaeda.
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