Bombers "Very Likely" Died

Investigator: at least one of the bombers "very likely" died in blast

LONDON (AP) - A top British investigator says at least one of the bombers "very likely" died in one of last week's attacks in London.

The head of the Metropolitan Police antiterrorist branch says surveillance tapes show four men arrived at London's King's Cross station about 20 minutes before the blasts on three subway trains. Peter Clark says investigators have found personal documents or property of all four men at blast sites.

Investigators are trying to determine if all the bombers died in the four blasts. Clark says the investigation is moving with "great speed." He says investigators executed six search warrants today at locations that included homes of three of the four men in West Yorkshire.

Police arrested one man and are taking him to London for questioning.