An infant left for about two hours in a hot car died -- the second such death during the weekend in the city, officials said.
Firefighters were called shortly before 3 p.m. Saturday to investigate a report of a 1-year-old boy, Jasiah Riggins, in a car in the parking lot of the Free Church of God in Christ, authorities said.
The Mesa Police Department said Phoenix police and fire crews were called out.
They said earlier in the day, Jasiah's father had dropped of his wife and his other child at the church in Phoenix; he returned back to his home in Mesa with Jasiah to nap with him. A few hours later, the father drove to the church to pick up his family; when he was arriving, he noticed the baby had been left behind inside the vehicle.
No arrests have been made; Mesa police are calling this a "tragic accident" after initial observations. The investigation is ongoing.
On Friday, authorities say a 7-month-old boy died after being left alone in a hot car in a northeast Phoenix neighborhood in triple-digit conditions. He was identified by police as Zane Endress.
Emergency personnel were called to the scene about 4 p.m. Friday, fire department officials said. When officers arrived, witnesses reported the baby had been left in the vehicle for an extended period of time. The boy was pronounced dead a short time later, police said.