Bystander in serious condition after shooting near White House checkpoint

US Secret Service police officers place crime scene tape after a copper jacket of a bullet was found near the scene of a shooting close to the White House (Alex Brandon/AP)

A bystander who was struck by gunfire after a man fired on a checkpoint outside the White House and was fatally shot by US Secret Service officers remained in serious but stable condition on Sunday.

The Secret Service said the bystander, who has not been identified, suffered a gunshot wound described as not life-threatening.