LIBERTY COUNTY, Texas -

Searchers looked Wednesday for a missing 2-year-old boy believed to have wandered into a wooded area in Liberty County.

An Amber Alert was issued for Devin Davis on Tuesday. Liberty County sheriff's deputies said Devin wandered off while his mother and sibling were napping at the their new home in the Sam Houston Lake Estates area near Tarkington about 3:30 p.m. She found the door open and the child gone.

The Davis family has only lived in their home since Thursday as they recently moved to the area from another state.

The area has thick underbrush and bodies of water. A creek is behind the house. There are snakes and alligators in the area.

Detectives said they fear that Devin may have been kidnapped after he wandered off.

"At this time, we have not confirmed whether or not this is an abduction or if it is a lost child, " said Capt. Rex Evans with the Liberty County Sheriff's Office.

More than 100 officials and volunteers from Liberty County and the surrounding areas were searching by air and land, and said they would keep searching for the boy around the clock.

The Houston Police dive team and Texas EquuSearch joined the search Wednesday morning. Evans said waterways near the home have been searched and nothing was found.

Texas EquuSearch has used sonar devices to look for Devin.

"The problem with doing the sonar is there's just so much debris underneath the water," Texas EquuSearch founder Tim Miller said. "You get a false image and you have to go back over it two or three times to determine what it is."

Investigators have searched Devin's home looking for clues, too.

"Both parents are here, devastated and in a word -- very frantic. We're doing everything we can to find him right now," Evans said. "Every minute counts. Every second counts."

Evans said Devin's parents are heartbroken and have been cooperating in the investigation. Investigators said Devin's mother took a short nap because she was simply exhausted, and Devin's father was at work when his son disappeared.

"We've had grown people missing in these woods and it took four days to find them. This is a 2-year-old," neighbor Deborah Scott said.

Neighbors have been trying to find Devin.

"I've been driving the area just to see if I can see anything or hear anything," neighbor Rose Swanson said.

Detectives said they have searched every building in a one-mile radius of the home without luck.

Police said nothing has been ruled out in the case, including the possibility that Devon let himself out of the home.

The Texas Rangers and FBI are also involved in the investigation, Evans said.

More searchers were expected at daybreak Thursday.

"We hope for a miracle on this case. We're hoping he still is alive out there. But we don't sugar coat anything. It doesn't look good," said Miller.

Miller said Devon's parents asked to help with the search on Wednesday but weren't allowed because no one knows what will be found.

"If I was honest with myself right now, I'd say we're in recovery. I think that everybody involved agrees with that. But we're holding onto that miracle," added Miller.

Miller said the terrain is difficult to search because of the woods, water, and wildlife. He said his volunteers have seen alligators, snakes, and wild boars.

Devin is 30 inches tall and weighs 40 pounds with red hair and blue eyes. He was last seen wearing a red and gray jersey T-shirt, jeans and Spiderman tennis shoes.

Anyone with information regarding Devin's whereabouts is asked to call the Liberty County Sheriff's Office at 936-336-4500.