The Secret Service on Wednesday arrested an Iowa man after finding a hunting rifle, dozens of rounds of ammunition and a knife in the trunk of his car parked near the White House, according to ABC News.

R.J. Kapheim, 41, was arrested on a charge of having an unregistered firearm, which is illegal in the District of Columbia.

Kapheim, from Davenport, Iowa, was arrested after he approached uniformed officers along 15th Street just before 1:00 p.m. local time and explained that someone in Iowa told him to drive to the White House.

He later showed them to his car parked nearby and let officers search the vehicle.

The agency said that officers found the rifle, ammunition and a 6-inch knife in the truck of his 2013 Volkswagen Passat.

It was unclear if Kapheim had a lawyer.

The Secret Service has been widely criticized in recent months after a series of serious security breaches. In September a Texas man armed with a knife was able to climb over a White House fence and made it deep into the executive mansion.

It was later revealed that the man, Omar Gonzalez, got far further into the building than initially said. 

According to an executive summary of a Homeland Security review of that incident, some officers on the White House grounds that night thought thick bushes near the building’s front door would stop the intruder. They were also surprised when he was able to walk through a pair of doors, which were unlocked.

In October, a man jumped the White House fence and was attacked by Secret Service dogs before being arrested.

In another incident, an armed contractor was allowed to get into an elevator with President Barack Obama during a trip to the Centers for Disease Control.