Police announced on Thursday that a man who entered the U.S. Capitol with a handgun in his possession and conducted a tour of the building is now facing weapons charges.

According to a news release from Capitol police, the 27-year-old Massachusetts man was apprehended on Tuesday after they observed him exiting the Library of Congress and heading toward his vehicle, as Fox News reported.

Officers discovered a handgun concealed in his waistline, according to the police.

The Capitol police said they discovered no evidence that the man "was coming to harm the Congress," and no one was injured.

Moving Through Security

A police officer who permitted the individual to enter the Capitol after conducting a search has been suspended pending the outcome of a departmental investigation.

In a surveillance video, the man was observed entering the Capitol through a security checkpoint.

The officer conducted a "secondary hand search" after the magnetometers sounded, and subsequently permitted him to enter the building, according to the police.

The Capitol police asserted that their office “demands the highest standards when it comes to screening visitors, so a full review of this incident has already been ordered, as well as mandatory refresher training on security screening, so this never happens again,” the department said.

Offender's Arrest

The man was detained for a number of offenses, including carrying a pistol without a license, possessing an unregistered firearm, illegally possessing ammunition, and resisting arrest.

Members of Congress who are in charge of the committee that oversees the Capitol police expressed frustration saying they were  “severely disappointed in the security failure” and stated that they will require the department to perform "a robust review of all visitor screening practices."

“We must ensure this never happens again,” said a joint statement from the House Administration committee’s chair, Rep. Bryan Steil, R-Wisconsin, and ranking member, Rep. Joe Morelle, D-New York.

Details from Police

Police said in an additional statement to NBC New York, that their department was advised to be on the lookout for ”a man with reported mental health issues and suicidal thoughts who was believed to be armed and in the area."

The officer has been placed on administrative suspension while the Office of Professional Responsibility within the Capitol Police Department investigates the incident.

“The USCP demands the highest standards when it comes to screening visitors, so a full review of this incident has already been ordered, as well as mandatory refresher training on security screening, so this never happens again,” the department said.