Emergency crews responded to reports of a child drowning in a Rancho Penasquitos pool Tuesday afternoon.
The call came from a pool at a condo in the 9300 block of Twin Trails Dr. at about 12:40 p.m., according to the San Diego Fire Department.
A witness told NBC 7 that a 3-year-old wandered into a gated pool area and fell into the spa for five to 10 seconds until a bystander saw the boy and ran to pull him out.
The witness said the gate should have been locked, but it was propped open.
CPR was administered on the scene. By the time the ambulance arrived, the boy was okay. Medics nevertheless transported him to the hospital.
While the ambulance was on its way to the hospital, the vehicle lost mechanical power, according to a spokeswoman for Rural Metro, the ambulance company.
The ambulance never had to stop, but a backup was requested just in case The toddler's wellbeing was not compromised, the spokeswoman said.
Check back for updates on this developing story.