Updated

The intruder who jumped the White House fence earlier this month and sprinted through the mansion's front door made it much farther into the building than previously claimed, sources told Fox News on Monday.

The sources confirmed a Washington Post report that the alleged intruder, Omar J. Gonzalez, overpowered a Secret Service officer and made it into the East Room on Sept. 19. A struggle and "wrestling" inside the White House ensued.

The revelation came on the eve of a House Oversight and Government Reform Committee hearing to address the breach, at which Secret Service Director Julia Pierson was expected to testify. The Tuesday hearing will address lawmakers' "concerns" about the Secret Service's security protocols.

Gonzalez, 42, who allegedly had a knife, was eventually tackled by a counter-assault agent in the East Room after he reached the doorway to the Green Room, a parlor overlooking the South Lawn.

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