A 3-year old boy was pronounced dead Wednesday after wandering away from his home on Pine Street and being found unresponsive in a swimming pool at a home on Market Street.

Efforts to revive the boy were unsuccessful, and he was pronounced dead at the scene.

Sgt. Rachelle Whiting of the Calaveras County Sheriff’s Office said “no matter what it is a tragic accident” but said it was too early to determine if anyone would be held culpable in the child’s death.

At 6:20 p.m., the Calaveras County Emergency Dispatch Center was notified of a child who had wandered away from his residence on the 200 block of Pine Street.

Whiting said when the call was placed to the Sheriff’s Office, the child had been missing for about 21 minutes.

The Sheriff’s Office initiated a full search response with patrol deputies, search and rescue personnel, California Highway Patrol officers, fire and medical units, citizen volunteers, a helicopter and a drone, she said.

“When a call like that comes out it's pretty much any and all units on patrol,” she said.

At 6:37 p.m., the child was located unresponsive in a neighbor’s swimming pool on the 100 block of Market Street.

Pine Street and Market Street are parallel to one another and a few hundred feet apart. Market Street is north of Pine Street and just adjacent to West Saint Charles Street (Highway 49), the main thoroughfare of the city.

It was still undetermined about how the child got from one place to the other, Whiting said, and a report had not been completed yet.

Whiting said the child was being supervised by at least one family member at the Pine Street home, but she was not sure if there were multiple people in the residence.

Calaveras County Sheriff’s detectives were investigating the situation Thursday, Whiting said.

Contact Giuseppe Ricapito at (209) 588-4526 or gricapito@uniondemocrat.com . Follow him on Twitter @gsepinsonora.