(Reuters) -Multiple people were killed after an explosion on Friday at a military explosives plant in Tennessee, and 19 people were unaccounted for, officials said.

Here are some notable fatal industrial explosions in the United States this century:

BP TEXAS CITY REFINERY, 2005

Fifteen workers were killed and 180 injured in an explosion at a BP refinery in Texas City, Texas, on March 23, 2005. A series of explosions occurred during the restarting of a hydrocarbon isomerization unit, the U.S. Chemical Safety Board said in a report. The explosions occurred when a distillation tower flooded with hydrocarbons and was overpressurized, causing a geyser-like release from the vent stack, the report said.

IMPERIAL SUGAR REFINERY, 2008

An explosion caused by combustible sugar dust killed 14 pe

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