WASHINGTON (AP) — An armed man walked into the Washington headquarters of a conservative Christian lobbying group Wednesday morning and was confronted by a security guard, whom he shot in the arm before the guard and others wrestled him to the ground, authorities said.

The man was taken into custody by the FBI and was being interviewed. Authorities did not identify the man or disclose where he was being interviewed.

Police and FBI officials said it's too early to know the circumstances of the shooting, which occurred around 10:45 a.m. at the headquarters of the Family Research Council, or whether it was connected to the group's activities.