BEAR, Del. (WPVI) -- The Delaware State Fire Marshal's Office has determined that an explosion that occurred Saturday afternoon in Bear, Delaware, was accidental.

The blast took place at approximately 12:30 p.m. along the 3300 block of Wrangle Hill Road, near the railroad crossing north of Red Lion Road. According to investigators, crews were working on a track maintenance vehicle equipped with a 500-pound propane tank when a malfunction occurred during the heating process of the tracks, causing the tank to explode.

The explosion completely destroyed the maintenance vehicle and ignited a large fire on the tracks. It also damaged several nearby structures, including a church and a warehouse located about 500 feet away. The church sustained significant damage, with windows blown out and i

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