WASHINGTON (AP) — President Barack Obama is expressing concern that an intruder carrying a knife was able to get into the White House where his family lives.

Obama press secretary Josh Earnest says Obama is “obviously concerned” that a man got through the White House front doors Friday evening a few minutes after the first family left for Camp David. But Earnest says Obama has complete confidence in the Secret Service.

Earnest wouldn’t say whether Obama wants to see security expanded to a wider perimeter around the White House. The Secret Service is discussing that as an option.

Earnest says in response to the breach, the Secret Service is reviewing its policies, technical enhancements, staffing levels and previous interactions with the Texas man who gained access by jumping a fence.

On Monday, a federal prosecutor says that investigators found more than 800 rounds of ammunition in the White House intruder case, along with a machete and two hatchets.

In a federal court proceeding, Assistant U.S. Attorney David Mudd said that the accused intruder, Omar J. Gonzalez, was a danger to the president.

He said the ammunition and the other items were discovered in a search of Gonzalez’s car.