A security guard at the Family Research Council was shot and wounded in the arm Wednesday morning after a scuffle with a man said to be carrying a Chick-fil-A bag in the lobby of the organization’s headquarters in Washington.

The shooter walked into the lobby and was confronted by the security guard, according to The Washington Post. The man had a gun and opened fire at at the guard but the guard and bystanders wrestled him to the ground.

Fox News reported that the case is being treated as a case of “domestic terrorism.”

The FBI is investigating and they have the shooter, who received bullet wounds himself, in custody. His identity has not been released, but Fox News said he was “posing as an intern.” The name of the guard, whom police are calling a hero, has also not been released.