An 18-month-old girl was pronounced dead at a hospital after she was pulled from a swimming pool at an east-side home, authorities said.

Paramedics were called to an address on Bernita Circle near the intersection of South Harrison and East Stella roads shortly before 1 p.m., said Capt. Barrett Baker, a Tucson Fire Department spokesman.

The child was pulled out of a backyard swimming pool where she may have been for up to 20 minutes, Baker said.

An adult was performing CPR on the child before paramedics arrived and took over caring for the child, Baker said.

She was taken to a hospital where she was pronounced dead, he said.

There were several adults home at the time of the incident, said Baker.

The child’s mother laid down to take a nap, and her daughter was indoors at the time, Baker said. When the mother awoke, she could not find her child in the house, he said.

Several adults went outside to look for the child, and she was found in the pool, Baker said.

There was no fence around the pool, and the young girl “somehow got out the back door and into the pool,” Baker said.