An active negotiation is underway in Dallas, Texas where a suspect or suspects shot at police headquarters from an armored van using automatic weapons before taking off, leaving behind 3 suspicious packages, 1 of which was detonated by a remote ordinance robot. No officer or bystander injuries have been reported and residents have been evacuated from the area where the packages were found, though 1 of the suspects has claimed by phone during negotiations that he was shot during the encounter at police headquarters