UPDATE on Binghamton Shooting:14 Dead, Including Gunman

(CNN) -- A lone gunman killed at least 13 people and himself Friday in an immigration services center in Binghamton, New York, in what officials are calling the "most tragic day in Binghamton's history."

The gunman drove a car to the back of American Civic Association building to block the exit and entered the front of the building, where he shot two receptionists, Binghamton Police Chief Joseph Zikuski said.

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