Secret Service agents killed a 21-year-old man who opened fire at a White House security checkpoint on Saturday [1], [2].

The incident highlights growing security concerns surrounding the executive mansion, marking the third time in the past month that gunfire has occurred near President Trump [5].

Authorities identified the suspect as Nasire Best, a resident of Dundalk, Maryland [1]. Best opened fire near a security checkpoint in Washington, D.C., on the evening of May 23, 2026 [2], [3]. Secret Service agents responded to the attack and shot the suspect, who died at the scene [3].

During the exchange of gunfire, a bystander was also struck and wounded [3]. While the BBC reported the bystander was wounded, other reports said it was not immediately clear how the individual was hit [3].

Investigators have not yet disclosed a motive for the attack. However, records indicate that Best had been previously arrested by the Secret Service [2].

Security footage and witness accounts described a chaotic scene as agents neutralized the threat. The area remained under heavy guard while federal investigators processed the site for evidence.

This event follows a series of security breaches and threats in the capital. The Secret Service has not released further details regarding the suspect's prior legal history or the specific nature of his previous encounter with the agency [2].

A 21-year-old man from Maryland was killed by Secret Service agents after opening fire at a security checkpoint.

The recurrence of gunfire near the White House—three incidents within a single month—suggests a volatile security environment. The fact that the suspect had a prior history with the Secret Service may prompt a review of how the agency monitors individuals previously detained for security-related offenses.