The following is a timeline of events of the shooting at the Washington Navy Yard early Monday, as reported by The Associated Press.
Taping of Latin music program postponed
WASHINGTON — White House postpones taping of Latin music program, citing Navy Yard shooting.
DC Navy Yard shooter was Navy reservist
WASHINGTON — DC Navy Yard shooter was full-time Navy reservist; based in Texas when he left service in 2011.
13 dead in shootings
WASHINGTON — DC Mayor: 13 dead in shootings at Washington Navy Yard, including gunman.
Officials: Police officer, 2 civilians expected to recover
WASHINGTON — Officials: Police officer, 2 civilians being treated at DC hospital expected to recover
Officials: Shooter who died after rampage identified as Aaron Alexis
WASHINGTON — Officials: Washington Navy Yard shooter who died after rampage identified as Aaron Alexis.
Washington Nationals cancel Monday night game with Atlanta Braves due to Navy Yard shooting
WASHINGTON — Washington Nationals cancel Monday night game with Atlanta Braves due to Navy Yard shooting.
Senate officials say Senate to be shut down while Navy Yard shooter is sought
WASHINGTON — Senate officials say Senate to be shut down while Navy Yard shooter is sought.
Police: Man seen at Navy Yard in tan outfit identified
WASHINGTON — DC Police: Man seen at Navy Yard in tan outfit identified, not a suspect or person of interest.
DC police chief: 12 dead
WASHINGTON — DC police chief: 12 dead in shootings at Washington Navy Yard.
Possibly two more shooters
WASHINGTON — DC police chief: May have 2 additional shooters at large after rampage at Navy Yard.
Obama: 'Cowardly act'
WASHINGTON — Obama: We will hold those responsible for this 'cowardly act' responsible.
Obama speaks out
WASHINGTON — Obama: 'Several people' shot, some killed in 'mass shooting' in Washington.
Suspects dressed in military uniforms
WASHINGTON — DC police chief: 2 additional suspects were wearing military-style uniforms.
Officer shot in gunfight
WASHINGTON — Police chief: DC officer shot in gunfight with Navy Yard shooter; 1 shooter killed.
Navy officials: At least 6 dead in Navy Yard shooting
WASHINGTON — Navy officials: At least 6 dead in Navy Yard shooting.
Shooter at Navy Yard has died
WASHINGTON — Federal law enforcement official: Shooter at Washington Navy Yard has died.
Possible second shooter
WASHINGTON — Officials: Police looking into possibility of second shooter at Navy Yard where several killed.
Obama getting updates on Navy Yard shooting
WASHINGTON — President Barack Obama is getting frequent briefings on a deadly shooting at the Washington Navy Yard.
The White House says the president had several briefings about the unfolding situation by senior aides.
The Navy says shots were fired Monday morning at the Naval Sea Systems Command headquarters, where about 3,000 people work. A Defense Department official is reporting several people were killed and as many as 10 wounded.
The White House says Obama directed his team to stay in touch with the Navy, FBI and local officials.
Defense official: Several killed, as many as 10 wounded in Navy Yard shooting
WASHINGTON — Defense official: Several killed, as many as 10 wounded in Navy Yard shooting.
Police responding to report of shots at Navy Yard
WASHINGTON — D.C. police and the FBI say there's a report of a shooter inside a military building at the Washington Navy Yard.
Police are responding to reports of shots fired, and an FBI spokeswoman says there's at least one victim.
The U.S. Navy also confirmed on Twitter that they're looking for a gunman.
The Washington Navy Yard says on its website that it's the Navy's oldest shore establishment. It's home to the chief of Naval Operations and is also headquarters for the Naval Historical Center and numerous naval commands.