Four people have been arrested in Manchester, under Britain’s main anti-terrorist law, with police adding that it was unclear whether they were linked to the London bombings. The four — two men, aged 48 and 23, and two women, 48 and 27 — were detained in the early hours of Monday at Manchester airport, prompting a raid later in the day on a house in Dudley, west of Birmingham, Greater Manchester Police said Tuesday.Full Story