A source says the deadly explosion on a residential block in Philadelphia's Nicetown neighborhood could be gas-fueled.

Neighbors say the explosion that caused multiple rowhomes to collapse in the Nicetown section of Philadelphia Sunday morning woke them up and shook their homes. "It just sounded like a bomb, a large bomb. A very large bomb," said Jamil Harris, who lives in Nicetown.

One person is dead and two others injured after a fire and explosion in Philadelphia leveled or damaged multiple homes.