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.

The cause of the explosion on a block in Nicetown is under investigation. Three rowhome buildings partially collapsed due to the explosion.

A neighborhood in Philadelphia was blown apart by an explosion early Sunday morning ... and, pictures taken at the scene captured the devastation.