Five people were injured in a blaze that involved three Philadelphia houses.
Firefighters encountered heavy fire on the first and second floors of a house on Kayford Circle, The Philly Voice reported.
The flames quickly spread to two neighboring houses.
"I heard someone screaming, 'help me,' and then explosions," a neighbor told the station. "I came and looked out the window, and the house was on fire."
The explosion may have been a propane tank.
Three people from the home where the fire started as well as two from the other houses were taken to the hospital for treatment of burns and smoke inhalation.
The cause is under investigation.
