Update (4:40 p.m. EDT): The suspect's name hasn't officially been released, but "two law-enforcement officials told NBC News he is Floyd Corkins, 28, from nearby Herndon, Va. A photographer who saw the suspect being arrested describes him as a 6-foot-3, 250-pound black male." Reporter Pete Williams cites a separate official who said the suspect bought the gun used in the shooting five days ago. Separately, WJLA is reporting the suspect "criticized [FRC's] anti-gay stance" before he opened fire. Exactly what he said isn't clear, but "multiple sources tell [reporter Jennifer] Donelan that the overtones of his statement led to federal law enforcement officials becoming involved in the investigation."

Update (3:19 p.m. EDT): Local NBC reporter Jackie Benson tweets some startling details, including that the shooter had Chick-fil-A promotional materials. The significance of the Chick-fil-A materials is that Tony Perkins, the FRC president, rushed to the defense of Chick-fil-A president Dan Cathy when he came under fire for saying he didn't support gay marriage:

Update (2:32 p.m. EDT): As we wait for more details on the incident, including about the motive, presidential candidate Mitt Romney issued a statement, per the Washington Examiner:

I am appalled by the shooting today at the offices of the Family Research Council in our nation’s capital,” he said. “There is no place for such violence in our society. My prayers go out to the wounded security guard and his family, as well as all the people at the Family Research Council whose sense of security has been shattered by today’s horrific events."

Update (1:34 p.m. EDT): Fox News is also reporting the suspect posed as an intern, but Talking Points Memo reporter Ryan J. Reilly, who is on the scene, tweets, "Man with Family Research Council badge on is treating this Fox News report with suspicion, FWIW." 

Update (1 p.m. EDT): The Washington Post's updated report on the shooting cites D.C. police chief Cathy Lanier (left), who says the shooter walked into the lobby of the building at about 10:45 a.m., when the security guard confronted him and asked where he was going.

The man then took out a gun and opened fire on the guard, Lanier said. The guard and others wrestled the man to the ground, disarmed him and waited for police, she said. The guard was then taken to the hospital and is in stable condition, the chief said. 

The Post's story does not mention any comments by the shooter about FRC policies, but notes the FBI and D.C. police are both on the scene.

Update (12:45 p.m. EDT): The first suggestion of a motive comes from Fox News, which cies a source who said he "made statements regarding their policies, and then opened fire with a gun striking a security guard." An FRC spokesman declined to confirm or deny whether that happened. The FRC is a conservative non-profit that advocates against same-sex marriage and abortion, among other issues. Meanwhile, Casey Maddox, who works in the building, tweeted a photo (at right) of the bomb squad entering the building. 

Original: There's very limited information about the shooting that took place at the Washington, D.C. headquarters of the conservative Family Research Council on Wednesday, but the FRC did confirm one of its guards was shot. The suspect, now in custody, was also wounded in the shooting, which the local ABC affiliate WJLA reports took place "either near or at the offices of the Family Research Council, which is located at 801 G Street." DCist reports the guard was shot in the arm before police responded at about 10:50 a.m. 

FRC confirmed that the security guard worked for it, with president Tony Perkins saying in a statement: "The police are investigating this incident. Our first concern is with our colleague who was shot today. Our concern is for him and his family." There's still no solid information indicating the shooting had anything to do with FRC or its politics, but the conservative news site Town Hall has an unattributed report that "The suspect walked into the FRC office, mumbled some words about FRC's beliefs and opened fire." A spokesperson 

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[Lead photo via Ryan J. Reilly's Twitter]