WATERVILLE – A 6-year-old boy died Wednesday after falling into his great-grandparents’ swimming pool, police said.

Zyah Denis of Prescott Valley, Ariz., was found in the backyard pool Tuesday afternoon after he went missing, said Deputy Police Chief Joseph Massey. The boy died at about 2 a.m. at Eastern Maine Medical Center in Bangor.

The boy’s mother, Casey Denis, called police saying her son was missing and that she had seen him five minutes earlier, Massey said. Police and firefighters found the boy half an hour later in the deep end of the pool.

He was taken to a Waterville hospital and then transferred to EMMC.