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;Resize=(620)) The chief of the ?District of Columbia police department said investigators believe the suspect was a guest at the Washington Hilton hotel, where the annual dinner was ?taking place, but that no motive had been determined.
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;Resize=(620)) U.S. envoys are expected to travel to Pakistan on Saturday in a new bid to salvage ceasefire talks with Tehran, even as Iran ruled out direct negotiations with U.S. representatives as its top diplomat arrived in Islamabad.
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