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.

A fire and explosion were reported and three rowhome buildings collapsed in Philadelphia's Nicetown-Tioga neighborhood early Sunday, sending at least two people to hospitals, officials said.