15 March, 2017
When an agent questioned the intruder, he said he was Trump's friend and had an appointment.
Tran was charged late Saturday in a District of Columbia federal court with "entering or remaining in restricted grounds while using or carrying a unsafe weapon".
Tran hid "behind a White House pillar before proceeding to the South Portico Entrance" at one point, the document states.
The man was arrested by a Secret Service member near the south entrance to the executive resident, according to the report.
According to the Secret Service, the suspect had no arrest record or history with the agency charged with protecting the president, his family and other elected officials.
In the letter, 'Tran mentioned Russian hackers and said he had information of relevance. The most serious recent security breach of the White House was in 2014, when an intruder with a knife jumped the fence, ran through the front door and made it all the way into the East Room, often used for receptions and addresses, before being tackled by security.More news: Cruising for a bruising: Ship nearly crashes into Florida home
Tran is expected to appear in a federal court today.
"This is really troubling", said Jonathan Wackrow, an ex-Secret Service agent.
Trump, who was in the White House at the time, said he was told about the intruder on Friday night.
Agents previously said the president was not in danger, and the Secret Service initially reported that the backpack didn't contain anything unsafe.
The Secret Service is trying to determine how Tran managed to get near the building without being detected, officials said.