The suspects are Tennessee residents, Dunn said. No additional information about the youths was made available, including their age and gender.
"I understand that you have a lot of questions," Dunn told reporters. "However, the law does not allow for the disclosure of additional information at this time."
The "Chimney Tops 2" fire was first reported Nov. 23 in the Great Smoky Mountains National Park near Gatlinburg, according to the National Park Service. The wildfire exploded on Nov. 28, as massive walls of flames spread down the mountains into Gatlinburg and Pigeon Forge with shocking speed, according to those who fled with little more than the clothes on their backs.
The fires that engulfed the two tourist towns outside the park and shut down one of the country's most popular natural attractions left more than 1,750 structures damaged or destroyed, most of them single-family residences. Additionally, thousands of wooded acres burned in the most-visited national park in America.
"To the residents of Sevier County: We stand with you and are committed to making sure justice is served in this case," TBI Director Mark Gwyn said at the news conference Wednesday.
He added: "Our promise is that we will do every effort to help bring closure to those who have lost so much."
The investigation, Gwyn said, is ongoing.