PUEBLO, Colo. (AP) Update 6:40 p.m. According to the Pueblo Chieftain, police say it is possible the fire started because drugs were being made or used in the apartment, but authorities emphasized the investigation is continuing.
The deceased have now been identified as 25-year-old Natasha Fiore and her son Eliza Pino. The grandmother is in critical condition, and the other child, who is 5, has been airlifted to a Colorado Springs hospital.
People in two other apartments that were on fire made it out safely.
Authorities say a woman and her 3-year-old child died during an apartment fire in Pueblo on Christmas Day.
According to KMGH-TV, the fire was reported at 4:36 a.m. Wednesday and firefighters were able to contain it in about an hour. The television station reports a grandmother and another child in the apartment were able to leave the unit safely.
Authorities say one firefighter was injured and taken to a hospital but it's unclear how severe the injuries are.
The fire engulfed three apartments. People in two of the apartments made it out safely.
Investigators are looking into the cause of the fire.