Authorities in Southern California are in the process of searching for possible human remains at the home of Terry Dewayne Smith Jr., an 11-year-old autistic boy who vanished over the weekend.

According to a Riverside County sheriff’s deputy, detectives investigating Terry's disappearance were led to the home in Menifee Rose shortly after 1 a.m. PDT Wednesday after evidence indicated that there might be a body at the property.

Meanwhile, volunteers are continuing to search the surrounding area for the boy, who was last seen on Saturday when authorities say he may have wandered off without food, water or his medication.

Approximately 1,000 volunteers and emergency workers have since participated in the search for Terry, covering a 55-square mile area of dry brown hills in Menifee Rose, where temperatures have topped 100 degrees every day since the boy disappeared.

"We pledge that we will continue this search effort until such time as circumstances dictate otherwise," Menifee Mayor Scott Mann said at a news conference. "We will continue searching. We will find Terry."

The Riverside County Sheriff's Department and numerous other agencies, including the FBI, aided in the investigation and search of the region about 70 miles southeast of Los Angeles with the help of bloodhounds, helicopters and horseback riders.

Terry is described as a 4-foot-8 boy with sandy brown hair and brown eyes. He was last seen wearing blue basketball shorts when he followed his 16-year-old half-brother, who told the boy to go home, the Desert Sun reported. The boy's mother didn't realize he was missing until the next day.