(NewsNation) — Police in Georgia are investigating after a clash between police and violent protesters in Atlanta this weekend resulted in 23 people being charged with domestic terrorism.

Tom O’Connor, a retired FBI special agent, said based on videos, it’s evident that the attack on the site of a future police training center was “clearly coordinated.”

“These people just didn’t arrive there and bring Molotov cocktails and bring commercial-grade fireworks,” O’Connor said Tuesday on “NewsNation: Rush Hour.” “This was all planned.”

Watch the interview with Tom O’Connor in the player above.