A gunman reportedly attacked the Washington D.C. offices of the Family Research Council this morning, injuring a security guard before being wrestled to the ground.

According to D.C. Police Chief Cathy Lanier, the shooter entered the lobby of the FRC building around 10:45 AM. He was approached by a man identified as head security guard Leo Johnson, and asked to state his business. A scuffle ensued, and the man drew a gun and shot Johnson in the arm. The guard managed to take the shooter down and disarm him with the help of passers-by.

The suspect is currently being held by the FBI awaiting formal charges.

"The security guard here is a hero, as far as I'm concerned," Lanier told reporters. "He did his job. The person never made it past the front."

While the Family Research Council is a highly controversial conservative Christian lobbying group with many adversaries, the FBI advised against speculation about the shooter's motive.

"We don't know enough about him or his circumstances to determine what his connection is to this group [the research council] or his mental state, or what he was doing or thinking of doing," said the FBI's Washington Field Office head James McJunkin.

Fox News, meanwhile, says sources report that the shooter, a man in his late twenties, had multiple weapons on his person, and told the guard after being disarmed "it was not about you, it was what this place stands for."

FRC president Tony Perkins issued an official statement saying the organization's "first concern is with our colleague who was shot today."

UPDATE: NBC Washington is reporting that, in addition to the Sig Sauer 9 mm handgun the gunman was packing, "two loaded magazines with 15 rounds each" were found in his backpack along with "Chik-Fil-A promotional materials."

Though the man's identity has not yet been released, NBC confirms that he is 28 years old and lives in the DC area.

UPDATE 2: The suspected gunman has been identified as 28-year-old Floyd Corkins of Herndon, VA. A witness described Corkins to NBC News as "a 6-foot-3, 250-pound black male." He reportedly purchased the weapon used in today's shooting five days ago.

[photo via AP, video via WJLA]