U.K. police urge caution after arrest of bombing suspects

"LONDON (AP) — Terrorists still pose a serious threat to London despite the capture of the four men suspected of trying to bomb the city's mass transit system, police said. After a charged standoff between suspects and police in the British capital and a raid in Rome on Friday, an official at London's Metropolitan Police said they believed they had in custody all of those suspected of trying to carry out the botched attacks. At least three are of British citizens or legal residents of east African origin.
Another suspect also was arrested in west London but the official, who spoke on condition of anonymity, said his role was unclear. Investigators did not yet know whether he was a fifth would-be attacker whom they said earlier might have left an unexploded bomb in a west London park, the official said. (Related video: Police make new arrests...)" Click title for full story...