Five of the suspected London terrorists are still at large and are being urgently hunted, according to U.S. sources who have been briefed on the airplane bombing plot. Officials tell ABC News 24 people now have been taken into custody. Twenty-two are believed to be of Pakistani descent. One is Bangladeshi, and another is of Iranian descent, according to the officials. One of the arrests was made in the northeastern London suburb of Walthamstow. Residents said police took away a man in his late 20s at 2 a.m. today. The neighbors said the man was British-born, with one parent who is Iranian and had recently become very religious.