Pittsburgh Police, Fire and EMS responded to a report of a single-vehicle crash near the intersection of Island and Beaver avenues in Chateau around 4:25 p.m.
Zone 1 police officers found a burning car with multiple victims inside. The officers were able to pull a woman from the vehicle. Firefighters on scene pulled a toddler from the back seat.
EMS transported the woman to a local hospital, but she later died. The child was transported to a local hospital in critical condition.
A male in the car was pronounced dead at the scene. A dog in the vehicle also died.
Pittsburgh Firefighters put out the car fire.
The Crash Investigation Unit responded to process the scene. Beaver Avenue will remain closed while the investigation continues.
Witness accounts suggest speed may have been a factor in the crash.