AKIPRESS.COM - The intruder who broke into the White House this month made it beyond the front door and past an armed guard, then ran about 100 feet inside, much farther than previously disclosed, a federal law enforcement official said Monday, the U.S. media report.

Authorities say Omar Gonzalez, 42, scaled the black wrought-iron fence on Pennsylvania Avenue in front of the White House on Sept. 19 and sprinted across the lawn, then entered through the unlocked front door.

Gonzalez pushed past the guard — who should have been alerted by an alarm, but it never sounded — ran by the carpeted stairway leading to the Obama family living quarters, then into the stately East Room and to the doorway of the neighboring Green Room, where he was finally tackled, the law enforcement official said.

President Obama had left just 10 minutes earlier to go to Camp David with his family for the weekend.

Secret Service Director Julia A. Pierson will head to Capitol Hill on Tuesday to face questions from Cummings and other lawmakers about how the breach could have happened in one of the world's most well-guarded homes — and about how forthright the Secret Service was in the hours and days afterward, not only publicly but with law enforcement behind closed doors.

The intruder got past several layers of defense, starting with plainclothes officers patrolling outside to spot fence jumpers. A tactical team also missed him.

Dogs who are trained to attack anyone running across the White House lawn without permission weren’t released, a Secret Service official said that night, because officers could see Gonzalez was unarmed. Authorities said later that they found a folding knife with a 3.5-inch blade on him.

The guard at the front door is supposed to lock it when notified of an intruder, by an alarm or some other means. But the alarm box was muted, according to the law enforcement official, who did not know why it was silenced or who asked for it to be.