Seven people, including three from Pittsburgh, have been charged following a shoot-out with police in Georgia last week.
The Georgia Bureau of Investigation says 29-year-old Spencer Liberto, 30-year-old Matthew Macar and 35-year-old Sarah Wasilewski were charged with domestic terrorism and criminal trespass.
The shooting happened at the site of the future Atlanta Public Safety Training Center, which has been the subject of protest.
Police say they were conducting a search at campsites there to identify trespassers.
One protester allegedly refused to obey commands, then shot a Georgia State Trooper.
Officers fired back and killed the man.
The three people from Pittsburgh were staying at the site in protest, but it's not clear exactly why they were charged.
Police say they removed 25 campsites from the area and found mortar style fireworks, edged weapons, pellet rifles and a blow torch on site.