Search efforts continue for a 5-year-old boy who has been missing since Saturday in Oregon.

Joshua McCoy went missing from his Hauser home, according to the Coos County Sheriff’s Office. He and his mother had taken a nap Saturday afternoon, but when his mother woke up around 5:30 p.m. local time, Joshua was missing, according to the sheriff’s office.

The sheriff’s office said Joshua has autism and may not respond when called.

The sheriff’s office activated the California Oregon Regional Search and Rescue Task Force CORSAR to assist in the search for the child.

Drones and K-9 resources joined the search effort. The sheriff’s office said it has also requested assistance from state and federal agencies, and additional resources are expected to arrive Tuesday.

The sheriff’s office said they have found “some clues” so far during the search, but “nothing definitive.”

“Nothing is being ruled out at this time as we are considering all possible avenues,” the Coos County Sheriff’s Office said in a statement Monday. he said. “We remain hopeful that Joshua will be found alive and well.”

Joshua, who will turn 6 on Saturday, was described by authorities as being 6 feet, 6 inches tall and weighing between 150 and 60 pounds, with brown eyes and brown shoulder-length hair.