The frantic search for missing teen Sebastian Rogers continues, as investigators promise they will leave "no stone unturned" more than a month after he mysteriously disappeared from his home.

Sebastian, a 15-year-old boy with autism, was last seen the night of Feb. 25 when his mother said she put him to bed in Hendersonville, Tennessee.

The next morning, he was gone, his mother told police, who issued an AMBER Alert.

Authorities previously said there was no evidence of foul play.

On Wednesday, the Sumner County Sheriff's Office announced they remain committed in their search for Sebastian as the investigation enters its sixth week.

"Despite exhaustive efforts, there are no new leads or evidence to indicate the search will be immediately fruitful. However, we are committed to leaving no stone unturned in our mission to locate Sebastian and bring him home safely," they said on Facebook.

The Tennessee Bureau of Investigation is also assisting in locating the missing teen, who was last seen wearing a black sweatshirt, black sweatpants, and glasses.

Sebastian is 5-foot-5-inches tall, 120 lbs., with brown hair and brown eyes.

Anyone with information on his whereabouts is urged to contact the Sumner County Sheriff's Office at 615-451-3838 or the TBI at 1-800-TBI-FIND.