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Several Killed As Gunmen Open Fire At U.S. Navy Yard

Multiple people were killed and several more wounded when at least one gunman opened fire Monday at the Naval Sea Systems Command headquarters, authorities said.

The Navy said "several" people were killed at the Navy Yard. Ed Buclatin, the public affairs chief for the Navy Installations Command, tweeted "four killed and eight injured." He also tweeted that reports of more than one shooter had not been confirmed.