ANDERSON TOWNSHIP, Ohio -- A community is coming together to help find a toddler who vanished Tuesday afternoon.

Hundreds of searchers have been combing a park in Anderson Township, Ohio, and surrounding neighborhoods to find the missing 3-year-old boy.

Marcus Fiesel was at Juilfs Park Tuesday afternoon when his foster mother had a medical problem and fainted.

While she was unconcious, Fiesel apparently wandered away from her and three other children.

A search commenced Wednesday that lasted until 2 a.m., then restarted Wednesday.

"We've had not one single positive sighting at this time," Hamilton County Sheriff's Office spokesman Steve Barnett said. "We still want to get the word out to be vigilant, to look everywhere on your property."

More than 160 people have formed 16 search teams to look for Fiesel, who family said is developmentally disabled and thinks like a 1-year-old child.

"We're in full swing right now. We're going to continue these operations until we're able to come up with information or find Marcus," Anderson Township Fire Chief Mark Ober said.

Searchers have moved into neighborhoods around the 28-acre park, and Barnett said that officials have even ordered Dumpsters within 2.5 miles of the park to remain unemptied until further notice.

Ober said many of the streets have been searched five or six times already, but that searchers will continue to cover those streets every two or three hours.

"We're all getting a little apprehensive at this point," Barnett said. "Very troubling, but we're continuing to pray and hope he's out there."

"I know he's not here, because if he was, he would've gone up to someone. He's a very friendly, loving boy," foster grandmother Debra Hounshell said.

Fiesel is white, about 3 feet tall, with brown hair and blue eyes. He was last seen wearing red shirt, black shorts and sandals.

Anyone with information about the child's whereabouts should call the sheriff's office at (513) 825-1500.