UPDATE: 7:15 p.m. EDT -- Jesse Olivieri, from Ashland, Pennsylvania, was identified Friday as the suspect shot Friday by Secret Service agents near the White House, NBC News reported.
"He was carrying a gun — it was a silver gun in clear sight, walked through the fence line," said Larry Samples, whom NBC described as a witness to the shooting.
"They immediately tried to stop him and came up to him," Samples said. "[Authorities] yelled multiple times 'stop, stop, stop.' He kept ignoring them."
A weapon was recovered from the suspect, the report said.
UPDATE: 5:30 p.m. EDT — Ammunition for a .22-caliber weapon was found inside a car near the White House that was said to belong to the suspect arrested Friday, the Washington Post reported.
The suspect, still unidentified, was described as a white male in his 30s, with blond hair, NBC News reported.
UPDATE: 4:17 p.m. EDT — The Secret Service confirmed that a police-involved shooting occurred near the White House complex Friday. A tweet by the Secret Service reported that all the individuals under its protection were safe.
UPDATE: 4:10 p.m. EDT — A lockdown at the White House has been lifted Friday after the Secret Service reportedly shot a person brandishing a weapon at a checkpoint, ABC News reported.
UPDATE: 3:55 p.m. EDT — Vice President Joe Biden was on the White House property Friday when a shooting occurred near the complex, ABC News reported. A representative told ABC that the vice president was "secure."
UPDATE: 3:48 p.m. EDT — A suspect brandishing a weapon near the White House is in custody, CNN reported. The Washington, D.C., fire and emergency services Twitter handle tweeted that a person with critical injuries was being taken to the hospital.
CNN reported on air that the unidentified suspect was shot in the abdomen after brandishing a weapon at a White House checkpoint. When he didn't obey order to drop the weapon, he was shot.
The shooting just west of the White House on Friday caused the property to go into lockdown, NBC News reported.
The White House was locked down Friday afternoon, according to multiple reports. ABC News reported that President Barack Obama was not on the property at the time.
Washington, D.C., ABC affiliate WJLA reported that the White House was locked down for a shooting. The nature of the shooting was unclear, but CNN reported on television that it took place near the Executive Mansion.
This story is developing...