A Colorado Springs 11-year-old boy, Gannon Stauch, has been missing for 5 days after running away, and now the FBI has joined the search.

Authorities and 160 volunteers extensively searched the neighborhood where the boy lived, and now the FBI is helping Colorado law enforcement try to figure out what happened.

Authorities first asked the public for help Monday, claiming the boy was a runaway, and was last seen wearing a blue jacket and jeans and left his house walking, according to AP News.

The boy’s stepmother, Letecia “Tecia” Stauch, told law enforcement he was on his way to a friend’s house Monday when he went missing, according to AP News.

If you have information, call (719) 520-7100.