A propane tank explosion on the Delmarva Central Railroad tracks in Bear, Delaware, damaged several buildings and homes Saturday afternoon, officials said.

Video obtained by CBS News Philadelphia shows thick black smoke before a large explosion sends bystanders running for cover.

"The ground shook like a bomb went off," said Chris Coviello.

The blast shattered windows, left lights inside some businesses dangling, and knocked pieces of drywall and ceiling tiles to the floor.

"Believe me it was a big boom when it blew," said Janet Davis.

Davis says she was just about to walk outside her home on Wrangle Hill Road because she saw a fire on the railroad tracks about 500 feet away. Then, all of a sudden there was an explosion and about six windows in her home shattered, and that wasn't al

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