McEWEN, Tenn. (AP) — A massive blast at a Tennessee explosives plant that killed 16 people, leveled the building and was felt more than 20 miles away began in an area where workers used kettles to produce a mixture of explosives and set off other explosives stored nearby, authorities said Friday.

Investigators still haven't been able to identify the remains of two of the people killed in the Oct. 10 explosion at the Accurate Energetic Systems factory in Bucksnort, an unincorporated community about 60 miles (97 kilometers) southwest of Nashville, officials said at a news conference.

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