Reports: More than 20 dead in Russian nuclear sub accident

Reports: More than 20 dead in Russian sub accident
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Russian submarine's fire extinguishing system went into operation in error

Submarine was in Pacific Ocean conducting tests, reports say

Accident did not affect sub's reactor; radiation levels on ship normal, reports say

MOSCOW, Russia (AP) -- Russian news agencies are reporting that an accident aboard a nuclear-powered submarine has killed more than 20 people.

Interfax quotes navy spokesman Capt. Igor Dygalo as saying the reactor is working normally and radiation levels are normal.
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