The cause of the explosion at the plant in Sergiev Posad became known

MOSCOW, 9 Aug An explosion at an optical-mechanical plant in Sergiev Posad, near Moscow, occurred, according to preliminary information, due to a violation of the technological process, a representative of emergency services said. — said the source of the agency.
Earlier, a representative of emergency services said that the explosion occurred, according to preliminary information, at an optical-mechanical plant in Sergiev Posad near Moscow.
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