A top FBI official warned Wednesday that it’s “only a matter of time” before drones that can carry and deploy explosives will be used in terrorist attacks in this country. Already, added FBI Deputy Director Chris Raia, a person “in China can control a drone over New Orleans.”

“We have seen that overseas, and it’s only a matter of time before somebody brings that type of attack, that threat vector here to the United States,” Raia told Fox News in an interview. He suspects that “the biggest threat right now” is drones that have a “kind of the five-yard target.”

“We have seen [what] drones can do overseas with an explosive payload on it,” he also said, adding that they have “not come to the United States yet,” reported The Epoch Times. 

“I’m less concerned about a mass 9/11-style attack than a lone single person, a single attacker,” he also said. He pointed to the fact that technology such as 5G and certain cellular networks enable someone to carry out such an attack from thousands of miles away. 

Raia called on the public to report any related suspicious activity to law enforcement.

With the World Cup games and other major public events taking place across the country, the FBI has seized around 300 drones in about two weeks.