ATLANTA (AP) — Police arrested a man at Atlanta’s bustling airport on Monday after receiving a tip from his family that he was planning to shoot up the premises, found an assault rifle and ammunition in his truck outside, the city’s police chief reported.

Billy Joe Cagle, of Cartersville, Georgia, had described his intentions during a social media livestream, according to Chief Darin Schierbaum, who held a news conference on the incident.

“The Cartersville Police Department was alerted by Cagle's family after they saw him streaming on social media that he was heading to the Atlanta airport to ‘shoot it up,’ and that he was armed,” Schierbaum detailed, noting that Cagle is a convicted felon.

Cagle, 49, drove to Hartsfield-Jackson Atlanta International Airport in a Chevrolet pickup truck, parked it right outside the terminal doors, and was found with an AR-15 rifle containing 27 rounds of ammunition.

“We’re here today briefing you on a success and not a tragedy because a family saw something and said something,” Chief Schierbaum emphasized.

Cartersville police Capt. Greg Sparacio affirmed that Cagle had the intent to cause harm to as many people as possible.

During the news conference, police released surveillance footage showing Cagle arriving at the airport, as well as body-camera video documenting his arrest.

A body-camera clip showed officers approaching Cagle using a photo that his family had provided. As officers subdued him, Cagle could be heard yelling.

Cagle faces multiple charges, including making terroristic threats, criminal attempt to commit aggravated assault, and possession of a firearm during the commission of a felony, among others. Efforts to contact his family for statements were unsuccessful, and the status of legal representation remains unclear.

Atlanta authorities are also collaborating with federal agencies to explore how Cagle gained access to the firearm, which he is prohibited by law from possessing.

Mayor Andre Dickens expressed gratitude, stating, “We’re thankful to God” for the information that prevented a potential tragedy.

In a statement on social media, Homeland Security Secretary Kristi Noem echoed relief over the swift action taken to detain Cagle before he could inflict harm.