New Delhi, May 24 -- An armed person, identified as 21-year-old Nasire Best, opened fire on a White House security checkpoint located near 17th Street and Pennsylvania Avenue NW on Saturday, May 23.

According to the US Secret Service, the person approached a checkpoint, "removed a weapon from his bag and began firing at posted officers," prompting the officers to return fire. He later died from his injuries at a hospital.

A bystander was also struck, but a law enforcement official said it wasn't clear whether that person was struck by the suspect's initial bullets or those fired subsequently by officers.

The Secret Service said none of its officers was injured, and that US President Donald Trump, who was at the White House at the time,...