FBI agents investigate a shooting at the Family Research Council headquarters

A security guard at the Washington, D.C., headquarters of the Family Research Council was shot on Wednesday.

Police and agents from the FBI and Bureau of Alcohol, Tobacco, Firearms and Explosives are investigating the shooting, reports The Lookout.

"Our first concern is with our colleague who was shot today," Family Research Council President Tony Perkins said in a brief statement. "Our concern is for him and his family."

According to a spokesman for the D.C. Metropolitan Police Department, the suspected gunman entered the lobby of the building in downtown Washington at 10:45 a.m. Wednesday morning. He was confronted by the security guard and opened fire.

The guard was shot in the left arm, police said. The gunman was tackled and then taken into custody.

"As far as I'm concerned, the security officer here is a hero," Metro Police Chief Cathy Lanier said.

There were initial, conflicting reports on the unidentified guard's condition. According to the Associated Press, the guard "is conscious and breathing" and is being treated at a local hospital.

"Bomb-sniffing dogs patrolled outside at building at Eighth and G streets after the shooting," the Washington Examiner said, noting it was "standard protocol." According to the paper, news of the shooting prompted several Washington-based conservative groups—including Americans for Tax Reform—to tighten security.

The Family Research Council is a Christian organization and conservative lobbying group that "promotes the traditional family unit and the Judeo-Christian value system." Its motto is "advancing faith, family and freedom." The group, which was founded in 1981, opposes gay marriage and abortion.