San Antonio firefighters took quick action to rescue two women who were trapped inside a burning home on the east side.
Flames broke out at a home in the 1100 block of N Pine Street just after 11 p.m.
Firefighters said they could hear the women screaming for help upon arrival and rescued them from one of three apartments inside the home.
The women became trapped because of burglar bars on their front door that locked from the inside with a key, firefighters said.
Firefighters pulled them out of the home and they were taken to San Antonio Military Medical Center in critical condition to be treated for smoke inhalation.
Fire crews battled the fire for about an hour before it was extinguished.
"We tried to get to the fire from the inside, offensive attack, but the roof and second floor became very heavily involved to the point where we suffered a back draft on the second floor," said Assistant Fire Chief Mike Walsh.
Arson investigators ruled the fire accidental, but had not determined the exact cause.
Firefighters said two of the three apartments in the home were destroyed by the flames, and damage was estimated at $90,000.