Chemical explosion in Newburyport leaves worker missing.
A chemical explosion at an industrial park in Newburyport, Massachusetts, has left one worker unaccounted for, while four others were treated and released from the hospital. The building sustained major structural damage, and an "industrial-sized vat" was found 30 feet away from the building. Authorities are continuing their search for the missing worker, and there is no danger to the public at this time.