Guard Dies Following Shooting Outside US Census Bureau Headquarters

— -- A security guard stationed at the main gate of Census Bureau outside Washington, D.C. was shot Thursday and later died, authorities said, and the suspected gunman later led police on a chase through the district.

Metropolitan Police Chief Cathy Lanier said Thursday that police received a call about an armed kidnapping in the District of Columbia about half an hour before the shooting in Suitland, Maryland, about 10 miles from the capital. Lanier said the car involved in the shooting matched the one involved in the kidnapping.

The guard was taken to a local hospital and later died, authorities said.

Police officers were then involved in a shootout and chase with a suspect in the District of Columbia, said Lanier. A Metropolitan police sergeant was shot. His condition was not released.

The suspect was also shot but police haven't released his condition.

Lanier said investigators believe the car involved in the shootout and police chase was also involved in the earlier kidnapping and shooting at the Census Bureau.

ABC News' Mike Levine and Pierre Thomas contributed to this story.