Update: Suspect shot after attack on Dallas police headquarters

DALLAS — A police sniper shot a cornered suspect in an overnight attack on the Dallas Police Department's headquarters, and authorities were checking Saturday to see if he was alive or dead.

The sniper shot the man following a standoff of several hours in a restaurant parking lot in the suburb of Hutchins, where he had fled in a van after the early-morning shootout outside of police headquarters near downtown Dallas, Dallas police Chief David Brown said at a news conference.

Investigators found a package containing pipe bombs near the headquarters building and the suspect told police negotiators that he had "C4" explosives in the van, Brown said. The chief said police were using a camera-equipped robot to inspect the van and to try to determine if the suspect was alive or dead.

Brown said investigators believe the man acted alone, even though early witness reports suggested there could have been as many as four attackers. Brown said the suspect apparently moved quickly during the attack, which may have given the impression that others were involved.

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