U.S. officials believe more terrorists tied to Brussels attack are at large, plotting new strikes

The comments from a U.S. official came as the Islamic State’s Web forum took official responsibility for Tuesday’s attack and threatened more strikes. The group promised “the alliance of crusaders” that it would see “dark days in response to their aggression against the Islamic State,” according to a statement in Arabic and French that was monitored by MEMRI, a group that tracks jihadist propaganda. The statement continued: “What awaits you will be grievous and bitter, with Allah’s permission.”









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