WASHINGTON TWP, Armstrong County — A 4-year-old boy died Saturday night after he wandered into a neighbor’s swimming pool and drowned, authorities said.

A medical helicopter flew Colby B. Nickel to Children’s Hospital in Pittsburgh after family members pulled him from the pool. He was later pronounced dead at the hospital.

Police believe the boy about 6:30 p.m. walked to a neighboring property just 100 feet from his home in northwestern Armstrong County, about 10 miles north of Kittanning.

Colby managed to climb over a locked gate that blocked access to the deck of an above-ground pool, according to a police report.

The boy, who could not swim went into the pool.

Some time later, the child’s family noticed he was gone and went looking for him. They found him motionless in the pool, police said.

Investigators did not immediately know how long the boy was in the pool.

Relatives began performing cardiopulmonary resuscitation on the child until a crew from the Sugrcreek EMS arrived.

Doctors at the hospital pronounced Colby dead at 8:16 p.m., according to the Allegheny Medical Examiner’s Office. The cause of death is listed as accidental drowning.

The Snyder-Crissman Funeral Home of Cowansville is handling funeral arrangements.