Washington: US authorities say a man carrying a loaded shotgun was arrested in January near the US Capitol, and that explosives left in his truck nearby went undetected for three weeks.

The revelation was made Tuesday. No one was injured in the accident.

According to an indictment filed in District of Columbia Superior Court, Michael Gorbey, 38, of Rapidan, Virginia, faces charges of planning to set off a bomb.

He also is accused of making or transporting an explosive device with the intent of using it against people or property and multiple firearms charges.