Authorities in Pakistan are searching for three more suspects they believe may be linked to the alleged plot to blow up transatlantic jets, an intelligence official said Thursday. The three suspects had been in contact with other alleged plotters who planned to blow up U.S.-bound planes leaving from London, the official told the Associated Press. He said the suspects were a British Muslim of Afghan origin, an Eritrean national and a Pakistani. Meanwhile, British authorities received warrants from a judge Wednesday to extend the detention of 23 people arrested in the alleged plot. The suspects, arrested last week in the...